./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-industry-pattern/nested-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-industry-pattern/nested-3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:00:14,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:00:14,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:00:14,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:00:14,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:00:14,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:00:14,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:00:14,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:00:14,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:00:14,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:00:14,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:00:14,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:00:14,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:00:14,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:00:14,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:00:14,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:00:14,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:00:14,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:00:14,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:00:14,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:00:14,427 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:00:14,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:00:14,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:00:14,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:00:14,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:00:14,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:00:14,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:00:14,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:00:14,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:00:14,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:00:14,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:00:14,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:00:14,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:00:14,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:00:14,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:00:14,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:00:14,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:00:14,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:00:14,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:00:14,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:00:14,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:00:14,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:00:14,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:00:14,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:00:14,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:00:14,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:00:14,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:00:14,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:00:14,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:00:14,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:00:14,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:00:14,474 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:00:14,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:00:14,475 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:00:14,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:00:14,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:00:14,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:00:14,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:00:14,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:00:14,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:00:14,476 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:00:14,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:00:14,476 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:00:14,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:00:14,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:00:14,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:00:14,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:00:14,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:00:14,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:00:14,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:00:14,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:00:14,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:00:14,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:00:14,478 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:00:14,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:00:14,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:00:14,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 [2022-07-12 04:00:14,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:00:14,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:00:14,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:00:14,714 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:00:14,715 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:00:14,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2022-07-12 04:00:14,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227f90971/c00731c2aeb94677a3174df661d50264/FLAG87c4b69b6 [2022-07-12 04:00:15,118 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:00:15,119 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2022-07-12 04:00:15,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227f90971/c00731c2aeb94677a3174df661d50264/FLAG87c4b69b6 [2022-07-12 04:00:15,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/227f90971/c00731c2aeb94677a3174df661d50264 [2022-07-12 04:00:15,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:00:15,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:00:15,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:00:15,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:00:15,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:00:15,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e0bc52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15, skipping insertion in model container [2022-07-12 04:00:15,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:00:15,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:00:15,709 WARN L230 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-industry-pattern/nested-3.c[404,417] [2022-07-12 04:00:15,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:00:15,725 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:00:15,733 WARN L230 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-industry-pattern/nested-3.c[404,417] [2022-07-12 04:00:15,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:00:15,744 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:00:15,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15 WrapperNode [2022-07-12 04:00:15,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:00:15,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:00:15,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:00:15,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:00:15,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,764 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-07-12 04:00:15,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:00:15,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:00:15,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:00:15,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:00:15,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:00:15,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:00:15,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:00:15,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:00:15,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (1/1) ... [2022-07-12 04:00:15,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:00:15,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:15,806 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) [2022-07-12 04:00:15,829 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 [2022-07-12 04:00:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:00:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:00:15,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:00:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:00:15,884 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:00:15,885 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:00:16,012 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:00:16,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:00:16,031 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 04:00:16,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:00:16 BoogieIcfgContainer [2022-07-12 04:00:16,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:00:16,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:00:16,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:00:16,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:00:16,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:00:15" (1/3) ... [2022-07-12 04:00:16,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d7cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:00:16, skipping insertion in model container [2022-07-12 04:00:16,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:00:15" (2/3) ... [2022-07-12 04:00:16,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d7cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:00:16, skipping insertion in model container [2022-07-12 04:00:16,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:00:16" (3/3) ... [2022-07-12 04:00:16,039 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2022-07-12 04:00:16,054 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:00:16,067 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:00:16,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:00:16,122 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4364bd38, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@683e6bc1 [2022-07-12 04:00:16,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:00:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 04:00:16,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:16,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:16,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:16,167 INFO L85 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2022-07-12 04:00:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:16,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032187328] [2022-07-12 04:00:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:16,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:16,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032187328] [2022-07-12 04:00:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032187328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:00:16,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:00:16,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:00:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679750759] [2022-07-12 04:00:16,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:00:16,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:00:16,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:00:16,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:00:16,377 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:16,428 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2022-07-12 04:00:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:00:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-12 04:00:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:16,436 INFO L225 Difference]: With dead ends: 31 [2022-07-12 04:00:16,436 INFO L226 Difference]: Without dead ends: 17 [2022-07-12 04:00:16,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:00:16,443 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:16,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:00:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-12 04:00:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2022-07-12 04:00:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-07-12 04:00:16,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-07-12 04:00:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:16,474 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-07-12 04:00:16,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-07-12 04:00:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 04:00:16,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:16,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:00:16,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2022-07-12 04:00:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:16,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845044892] [2022-07-12 04:00:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:16,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845044892] [2022-07-12 04:00:16,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845044892] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055904889] [2022-07-12 04:00:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:16,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:16,575 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) [2022-07-12 04:00:16,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:00:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:16,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 04:00:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:00:16,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:00:16,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055904889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:00:16,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:00:16,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-12 04:00:16,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625715757] [2022-07-12 04:00:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:00:16,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:00:16,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:00:16,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:00:16,668 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-07-12 04:00:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:16,701 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-07-12 04:00:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:00:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-07-12 04:00:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:16,703 INFO L225 Difference]: With dead ends: 33 [2022-07-12 04:00:16,703 INFO L226 Difference]: Without dead ends: 21 [2022-07-12 04:00:16,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:00:16,704 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:16,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:00:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-12 04:00:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-07-12 04:00:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2022-07-12 04:00:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-07-12 04:00:16,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2022-07-12 04:00:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:16,707 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-07-12 04:00:16,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-07-12 04:00:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-07-12 04:00:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 04:00:16,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:16,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:16,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:16,943 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 [2022-07-12 04:00:16,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2022-07-12 04:00:16,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:16,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260361662] [2022-07-12 04:00:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:16,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:16,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260361662] [2022-07-12 04:00:16,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260361662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602496604] [2022-07-12 04:00:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:16,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:16,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:16,967 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) [2022-07-12 04:00:16,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:00:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 04:00:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:17,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:17,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602496604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:17,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:17,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-12 04:00:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836532008] [2022-07-12 04:00:17,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:00:17,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:17,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:00:17,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:00:17,073 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2022-07-12 04:00:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:17,129 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-12 04:00:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:00:17,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) Word has length 12 [2022-07-12 04:00:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:17,131 INFO L225 Difference]: With dead ends: 38 [2022-07-12 04:00:17,131 INFO L226 Difference]: Without dead ends: 25 [2022-07-12 04:00:17,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:00:17,134 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:17,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:00:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-12 04:00:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-12 04:00:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-12 04:00:17,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2022-07-12 04:00:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:17,144 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-12 04:00:17,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2022-07-12 04:00:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-12 04:00:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 04:00:17,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:17,146 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:17,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:17,357 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 [2022-07-12 04:00:17,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2114699077, now seen corresponding path program 2 times [2022-07-12 04:00:17,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:17,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971728563] [2022-07-12 04:00:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:17,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:00:17,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971728563] [2022-07-12 04:00:17,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971728563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:17,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516458581] [2022-07-12 04:00:17,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:17,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:17,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:17,422 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) [2022-07-12 04:00:17,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:00:17,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:17,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:17,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:00:17,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:00:17,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:00:17,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516458581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:17,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:17,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-12 04:00:17,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560979097] [2022-07-12 04:00:17,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:17,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:00:17,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:00:17,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:00:17,578 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:17,700 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2022-07-12 04:00:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:00:17,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 04:00:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:17,702 INFO L225 Difference]: With dead ends: 101 [2022-07-12 04:00:17,702 INFO L226 Difference]: Without dead ends: 79 [2022-07-12 04:00:17,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:00:17,703 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:17,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 53 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-12 04:00:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-07-12 04:00:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 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) [2022-07-12 04:00:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-07-12 04:00:17,720 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 21 [2022-07-12 04:00:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:17,721 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-07-12 04:00:17,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-07-12 04:00:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 04:00:17,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:17,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:17,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 04:00:17,937 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 [2022-07-12 04:00:17,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1372768635, now seen corresponding path program 1 times [2022-07-12 04:00:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162245762] [2022-07-12 04:00:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:17,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:00:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162245762] [2022-07-12 04:00:17,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162245762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:00:17,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:00:17,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:00:17,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925469137] [2022-07-12 04:00:17,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:00:17,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:00:17,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:00:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:00:17,965 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:17,996 INFO L93 Difference]: Finished difference Result 177 states and 228 transitions. [2022-07-12 04:00:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:00:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 04:00:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:17,997 INFO L225 Difference]: With dead ends: 177 [2022-07-12 04:00:17,998 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 04:00:17,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:00:18,000 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:18,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:00:18,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 04:00:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2022-07-12 04:00:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 86 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) [2022-07-12 04:00:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-07-12 04:00:18,009 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 21 [2022-07-12 04:00:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:18,009 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-07-12 04:00:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-07-12 04:00:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 04:00:18,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:18,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:18,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 04:00:18,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 2 times [2022-07-12 04:00:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647510633] [2022-07-12 04:00:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:18,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:18,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:18,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647510633] [2022-07-12 04:00:18,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647510633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584375518] [2022-07-12 04:00:18,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:18,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:18,059 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) [2022-07-12 04:00:18,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:00:18,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:18,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 04:00:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:18,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:18,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584375518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:18,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:18,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-12 04:00:18,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153886337] [2022-07-12 04:00:18,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:18,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:00:18,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:18,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:00:18,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:00:18,173 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-07-12 04:00:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:18,240 INFO L93 Difference]: Finished difference Result 295 states and 395 transitions. [2022-07-12 04:00:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:00:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 21 [2022-07-12 04:00:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:18,246 INFO L225 Difference]: With dead ends: 295 [2022-07-12 04:00:18,246 INFO L226 Difference]: Without dead ends: 210 [2022-07-12 04:00:18,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:00:18,248 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:18,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-12 04:00:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2022-07-12 04:00:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.2164948453608246) internal successors, (236), 194 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2022-07-12 04:00:18,268 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 21 [2022-07-12 04:00:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:18,269 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2022-07-12 04:00:18,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-07-12 04:00:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2022-07-12 04:00:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:00:18,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:18,271 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:18,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 04:00:18,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:18,490 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:18,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1505496997, now seen corresponding path program 3 times [2022-07-12 04:00:18,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:18,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321190050] [2022-07-12 04:00:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:18,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:18,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:18,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321190050] [2022-07-12 04:00:18,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321190050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:18,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472410511] [2022-07-12 04:00:18,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:00:18,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:18,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:18,615 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) [2022-07-12 04:00:18,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:00:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:00:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:00:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-12 04:00:18,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:00:18,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472410511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:00:18,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:00:18,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-07-12 04:00:18,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563732403] [2022-07-12 04:00:18,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:00:18,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:00:18,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:00:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:00:18,899 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:18,965 INFO L93 Difference]: Finished difference Result 509 states and 608 transitions. [2022-07-12 04:00:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:00:18,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-12 04:00:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:18,967 INFO L225 Difference]: With dead ends: 509 [2022-07-12 04:00:18,967 INFO L226 Difference]: Without dead ends: 507 [2022-07-12 04:00:18,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:00:18,968 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:18,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:00:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-07-12 04:00:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 319. [2022-07-12 04:00:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.1855345911949686) internal successors, (377), 318 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 377 transitions. [2022-07-12 04:00:19,010 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 377 transitions. Word has length 39 [2022-07-12 04:00:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:19,010 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 377 transitions. [2022-07-12 04:00:19,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 377 transitions. [2022-07-12 04:00:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:00:19,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:19,011 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:19,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 04:00:19,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:19,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:19,219 INFO L85 PathProgramCache]: Analyzing trace with hash 557414361, now seen corresponding path program 1 times [2022-07-12 04:00:19,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:19,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346167486] [2022-07-12 04:00:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:19,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 118 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:00:19,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:19,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346167486] [2022-07-12 04:00:19,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346167486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892671946] [2022-07-12 04:00:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:19,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:19,342 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) [2022-07-12 04:00:19,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:00:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 04:00:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:19,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:19,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892671946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:19,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:19,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-07-12 04:00:19,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351549009] [2022-07-12 04:00:19,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:19,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 04:00:19,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 04:00:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:00:19,759 INFO L87 Difference]: Start difference. First operand 319 states and 377 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 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) [2022-07-12 04:00:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:25,230 INFO L93 Difference]: Finished difference Result 2329 states and 2952 transitions. [2022-07-12 04:00:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-07-12 04:00:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 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 39 [2022-07-12 04:00:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:25,236 INFO L225 Difference]: With dead ends: 2329 [2022-07-12 04:00:25,236 INFO L226 Difference]: Without dead ends: 2122 [2022-07-12 04:00:25,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18399 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=11743, Invalid=35999, Unknown=0, NotChecked=0, Total=47742 [2022-07-12 04:00:25,249 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1037 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:25,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 99 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:00:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-07-12 04:00:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 516. [2022-07-12 04:00:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.1805825242718446) internal successors, (608), 515 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 608 transitions. [2022-07-12 04:00:25,284 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 608 transitions. Word has length 39 [2022-07-12 04:00:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:25,285 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 608 transitions. [2022-07-12 04:00:25,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 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) [2022-07-12 04:00:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 608 transitions. [2022-07-12 04:00:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 04:00:25,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:25,291 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:25,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:25,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:25,508 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash -244493731, now seen corresponding path program 2 times [2022-07-12 04:00:25,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:25,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209853912] [2022-07-12 04:00:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:25,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:25,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:25,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209853912] [2022-07-12 04:00:25,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209853912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:25,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464028154] [2022-07-12 04:00:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:25,766 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) [2022-07-12 04:00:25,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:00:25,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 04:00:25,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:25,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:26,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464028154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:26,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:26,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 52 [2022-07-12 04:00:26,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949602402] [2022-07-12 04:00:26,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:26,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 04:00:26,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:26,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 04:00:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1512, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 04:00:26,593 INFO L87 Difference]: Start difference. First operand 516 states and 608 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:28,838 INFO L93 Difference]: Finished difference Result 3286 states and 4211 transitions. [2022-07-12 04:00:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-07-12 04:00:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-12 04:00:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:28,846 INFO L225 Difference]: With dead ends: 3286 [2022-07-12 04:00:28,846 INFO L226 Difference]: Without dead ends: 2982 [2022-07-12 04:00:28,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4898 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6547, Invalid=13759, Unknown=0, NotChecked=0, Total=20306 [2022-07-12 04:00:28,852 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 621 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:28,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 76 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-07-12 04:00:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1331. [2022-07-12 04:00:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 1.2060150375939849) internal successors, (1604), 1330 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1604 transitions. [2022-07-12 04:00:28,925 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1604 transitions. Word has length 75 [2022-07-12 04:00:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:28,926 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1604 transitions. [2022-07-12 04:00:28,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1604 transitions. [2022-07-12 04:00:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-12 04:00:28,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:28,928 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:28,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:29,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:29,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:29,145 INFO L85 PathProgramCache]: Analyzing trace with hash 176530048, now seen corresponding path program 1 times [2022-07-12 04:00:29,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:29,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600966666] [2022-07-12 04:00:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:29,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-07-12 04:00:29,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600966666] [2022-07-12 04:00:29,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600966666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:00:29,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:00:29,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:00:29,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039489200] [2022-07-12 04:00:29,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:00:29,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:00:29,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:00:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:00:29,249 INFO L87 Difference]: Start difference. First operand 1331 states and 1604 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-07-12 04:00:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:29,314 INFO L93 Difference]: Finished difference Result 2230 states and 2713 transitions. [2022-07-12 04:00:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:00:29,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 144 [2022-07-12 04:00:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:29,318 INFO L225 Difference]: With dead ends: 2230 [2022-07-12 04:00:29,318 INFO L226 Difference]: Without dead ends: 1357 [2022-07-12 04:00:29,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:00:29,320 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:29,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:00:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-07-12 04:00:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1327. [2022-07-12 04:00:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.2036199095022624) internal successors, (1596), 1326 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1596 transitions. [2022-07-12 04:00:29,409 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1596 transitions. Word has length 144 [2022-07-12 04:00:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:29,410 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1596 transitions. [2022-07-12 04:00:29,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-07-12 04:00:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1596 transitions. [2022-07-12 04:00:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-12 04:00:29,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:29,411 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:29,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 04:00:29,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2130462941, now seen corresponding path program 3 times [2022-07-12 04:00:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:29,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423148795] [2022-07-12 04:00:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:29,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:30,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:30,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423148795] [2022-07-12 04:00:30,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423148795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:30,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256919350] [2022-07-12 04:00:30,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:00:30,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:30,197 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) [2022-07-12 04:00:30,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:00:30,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:00:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:00:30,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-07-12 04:00:30,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:00:30,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256919350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:00:30,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:00:30,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [49] total 55 [2022-07-12 04:00:30,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610533272] [2022-07-12 04:00:30,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:00:30,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:00:30,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:30,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:00:30,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1778, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 04:00:30,693 INFO L87 Difference]: Start difference. First operand 1327 states and 1596 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:30,896 INFO L93 Difference]: Finished difference Result 1784 states and 2117 transitions. [2022-07-12 04:00:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:00:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-07-12 04:00:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:30,901 INFO L225 Difference]: With dead ends: 1784 [2022-07-12 04:00:30,901 INFO L226 Difference]: Without dead ends: 1782 [2022-07-12 04:00:30,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1201, Invalid=1991, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 04:00:30,902 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:30,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-07-12 04:00:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1327. [2022-07-12 04:00:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.2036199095022624) internal successors, (1596), 1326 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1596 transitions. [2022-07-12 04:00:30,974 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1596 transitions. Word has length 147 [2022-07-12 04:00:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:30,975 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1596 transitions. [2022-07-12 04:00:30,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1596 transitions. [2022-07-12 04:00:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-12 04:00:30,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:30,979 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:30,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:31,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 04:00:31,187 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash 245147366, now seen corresponding path program 1 times [2022-07-12 04:00:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:31,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215027589] [2022-07-12 04:00:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:31,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-07-12 04:00:32,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:32,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215027589] [2022-07-12 04:00:32,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215027589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:32,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966981024] [2022-07-12 04:00:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:32,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:32,014 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) [2022-07-12 04:00:32,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:00:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:32,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:00:32,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-07-12 04:00:32,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-07-12 04:00:34,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966981024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:34,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:34,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-07-12 04:00:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220519954] [2022-07-12 04:00:34,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-12 04:00:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:34,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-12 04:00:34,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 04:00:34,296 INFO L87 Difference]: Start difference. First operand 1327 states and 1596 transitions. Second operand has 95 states, 95 states have (on average 3.0842105263157893) internal successors, (293), 95 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:35,534 INFO L93 Difference]: Finished difference Result 10053 states and 11687 transitions. [2022-07-12 04:00:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-12 04:00:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0842105263157893) internal successors, (293), 95 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2022-07-12 04:00:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:35,552 INFO L225 Difference]: With dead ends: 10053 [2022-07-12 04:00:35,552 INFO L226 Difference]: Without dead ends: 9165 [2022-07-12 04:00:35,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 04:00:35,556 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 729 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:35,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 32 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9165 states. [2022-07-12 04:00:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9165 to 2267. [2022-07-12 04:00:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2266 states have (on average 1.174315975286849) internal successors, (2661), 2266 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2661 transitions. [2022-07-12 04:00:35,834 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2661 transitions. Word has length 286 [2022-07-12 04:00:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:35,835 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 2661 transitions. [2022-07-12 04:00:35,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0842105263157893) internal successors, (293), 95 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2661 transitions. [2022-07-12 04:00:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-07-12 04:00:35,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:35,844 INFO L195 NwaCegarLoop]: trace histogram [184, 184, 182, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:35,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 04:00:36,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:36,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 540978050, now seen corresponding path program 2 times [2022-07-12 04:00:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432599079] [2022-07-12 04:00:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-07-12 04:00:38,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:38,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432599079] [2022-07-12 04:00:38,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432599079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:38,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580713918] [2022-07-12 04:00:38,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:38,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:38,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:38,849 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) [2022-07-12 04:00:38,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:00:38,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:38,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-12 04:00:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-07-12 04:00:39,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-07-12 04:00:47,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580713918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:47,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:47,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-07-12 04:00:47,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19492859] [2022-07-12 04:00:47,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:47,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-07-12 04:00:47,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-07-12 04:00:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2022-07-12 04:00:47,126 INFO L87 Difference]: Start difference. First operand 2267 states and 2661 transitions. Second operand has 189 states, 189 states have (on average 3.0423280423280423) internal successors, (575), 189 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:52,905 INFO L93 Difference]: Finished difference Result 18863 states and 21993 transitions. [2022-07-12 04:00:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-07-12 04:00:52,906 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 3.0423280423280423) internal successors, (575), 189 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 568 [2022-07-12 04:00:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:52,949 INFO L225 Difference]: With dead ends: 18863 [2022-07-12 04:00:52,950 INFO L226 Difference]: Without dead ends: 17437 [2022-07-12 04:00:52,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2022-07-12 04:00:52,959 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1429 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:52,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 47 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 04:00:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2022-07-12 04:00:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 4523. [2022-07-12 04:00:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 1.170499778858912) internal successors, (5293), 4522 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 5293 transitions. [2022-07-12 04:00:53,935 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 5293 transitions. Word has length 568 [2022-07-12 04:00:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:53,935 INFO L495 AbstractCegarLoop]: Abstraction has 4523 states and 5293 transitions. [2022-07-12 04:00:53,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 3.0423280423280423) internal successors, (575), 189 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 5293 transitions. [2022-07-12 04:00:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1133 [2022-07-12 04:00:53,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:53,949 INFO L195 NwaCegarLoop]: trace histogram [372, 372, 370, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:53,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:54,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 04:00:54,166 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1619735746, now seen corresponding path program 3 times [2022-07-12 04:00:54,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:54,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311968797] [2022-07-12 04:00:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 104162 proven. 51801 refuted. 0 times theorem prover too weak. 51805 trivial. 0 not checked. [2022-07-12 04:01:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311968797] [2022-07-12 04:01:04,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311968797] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976039133] [2022-07-12 04:01:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:01:04,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:04,780 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) [2022-07-12 04:01:04,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:01:04,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:01:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:04,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:01:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 556 proven. 104166 refuted. 0 times theorem prover too weak. 103046 trivial. 0 not checked. [2022-07-12 04:01:07,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 3 proven. 1116 refuted. 0 times theorem prover too weak. 206649 trivial. 0 not checked. [2022-07-12 04:01:09,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976039133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:09,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:09,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [189, 9, 7] total 200 [2022-07-12 04:01:09,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594167954] [2022-07-12 04:01:09,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:09,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-07-12 04:01:09,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-07-12 04:01:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18183, Invalid=21617, Unknown=0, NotChecked=0, Total=39800 [2022-07-12 04:01:09,656 INFO L87 Difference]: Start difference. First operand 4523 states and 5293 transitions. Second operand has 200 states, 200 states have (on average 3.095) internal successors, (619), 200 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:14,894 INFO L93 Difference]: Finished difference Result 12501 states and 14502 transitions. [2022-07-12 04:02:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. [2022-07-12 04:02:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 3.095) internal successors, (619), 200 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1132 [2022-07-12 04:02:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:14,896 INFO L225 Difference]: With dead ends: 12501 [2022-07-12 04:02:14,896 INFO L226 Difference]: Without dead ends: 0 [2022-07-12 04:02:14,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3023 GetRequests, 2251 SyntacticMatches, 3 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166156 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=146170, Invalid=447500, Unknown=0, NotChecked=0, Total=593670 [2022-07-12 04:02:14,925 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5549 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 1154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5549 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1154 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:14,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5549 Valid, 39 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1154 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 04:02:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-12 04:02:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-12 04:02:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-12 04:02:14,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1132 [2022-07-12 04:02:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:14,926 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-12 04:02:14,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 3.095) internal successors, (619), 200 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-12 04:02:14,927 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-12 04:02:14,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 04:02:14,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:15,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 04:02:15,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.