./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 35987657 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-?-3598765 [2022-07-21 02:43:46,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:43:46,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:43:46,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:43:46,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:43:46,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:43:46,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:43:46,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:43:46,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:43:46,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:43:46,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:43:46,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:43:46,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:43:46,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:43:46,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:43:46,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:43:46,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:43:46,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:43:46,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:43:46,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:43:46,341 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:43:46,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:43:46,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:43:46,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:43:46,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:43:46,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:43:46,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:43:46,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:43:46,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:43:46,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:43:46,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:43:46,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:43:46,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:43:46,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:43:46,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:43:46,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:43:46,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:43:46,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:43:46,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:43:46,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:43:46,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:43:46,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:43:46,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:43:46,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:43:46,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:43:46,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:43:46,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:43:46,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:43:46,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:43:46,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:43:46,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:43:46,384 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:43:46,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:43:46,385 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:43:46,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:43:46,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:43:46,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:43:46,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:43:46,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:43:46,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:43:46,390 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:43:46,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:43:46,390 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:43:46,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:43:46,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:43:46,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:43:46,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:43:46,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:43:46,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:43:46,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:43:46,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:43:46,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:43:46,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:43:46,392 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:43:46,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:43:46,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:43:46,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 [2022-07-21 02:43:46,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:43:46,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:43:46,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:43:46,648 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:43:46,648 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:43:46,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2022-07-21 02:43:46,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e6ad8dd8/03ef9a1191724c2a922c605089ee0a7e/FLAG2e357d19f [2022-07-21 02:43:46,988 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:43:46,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2022-07-21 02:43:46,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e6ad8dd8/03ef9a1191724c2a922c605089ee0a7e/FLAG2e357d19f [2022-07-21 02:43:47,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e6ad8dd8/03ef9a1191724c2a922c605089ee0a7e [2022-07-21 02:43:47,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:43:47,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:43:47,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:43:47,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:43:47,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:43:47,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5415cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47, skipping insertion in model container [2022-07-21 02:43:47,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:43:47,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:43:47,548 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] [2022-07-21 02:43:47,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:43:47,570 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:43:47,579 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] [2022-07-21 02:43:47,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:43:47,594 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:43:47,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47 WrapperNode [2022-07-21 02:43:47,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:43:47,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:43:47,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:43:47,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:43:47,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,648 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-07-21 02:43:47,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:43:47,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:43:47,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:43:47,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:43:47,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:43:47,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:43:47,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:43:47,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:43:47,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:43:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:47,698 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) [2022-07-21 02:43:47,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:43:47,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:43:47,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:43:47,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:43:47,731 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 [2022-07-21 02:43:47,773 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:43:47,774 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:43:47,912 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:43:47,916 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:43:47,917 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 02:43:47,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:47 BoogieIcfgContainer [2022-07-21 02:43:47,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:43:47,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:43:47,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:43:47,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:43:47,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:43:47" (1/3) ... [2022-07-21 02:43:47,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed4b18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:47, skipping insertion in model container [2022-07-21 02:43:47,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (2/3) ... [2022-07-21 02:43:47,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed4b18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:47, skipping insertion in model container [2022-07-21 02:43:47,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:47" (3/3) ... [2022-07-21 02:43:47,923 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2022-07-21 02:43:47,946 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:43:47,946 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:43:48,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:43:48,011 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@4a49926b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2540819c [2022-07-21 02:43:48,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:43:48,018 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) [2022-07-21 02:43:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 02:43:48,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:48,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:48,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2022-07-21 02:43:48,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:48,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175602833] [2022-07-21 02:43:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:48,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:48,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175602833] [2022-07-21 02:43:48,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175602833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:43:48,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:43:48,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:43:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963012371] [2022-07-21 02:43:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:43:48,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:43:48,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:43:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:43:48,221 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) [2022-07-21 02:43:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:48,271 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2022-07-21 02:43:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:43:48,273 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 [2022-07-21 02:43:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:48,278 INFO L225 Difference]: With dead ends: 31 [2022-07-21 02:43:48,279 INFO L226 Difference]: Without dead ends: 17 [2022-07-21 02:43:48,281 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 [2022-07-21 02:43:48,285 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 [2022-07-21 02:43:48,285 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] [2022-07-21 02:43:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-21 02:43:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2022-07-21 02:43:48,304 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) [2022-07-21 02:43:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-07-21 02:43:48,305 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-07-21 02:43:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:48,306 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-07-21 02:43:48,306 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) [2022-07-21 02:43:48,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-07-21 02:43:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 02:43:48,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:48,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:48,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:43:48,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2022-07-21 02:43:48,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:48,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558925350] [2022-07-21 02:43:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:48,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:48,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558925350] [2022-07-21 02:43:48,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558925350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:48,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29251386] [2022-07-21 02:43:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:48,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:48,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:48,357 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) [2022-07-21 02:43:48,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:43:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:48,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 02:43:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:43:48,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:43:48,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29251386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:43:48,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:43:48,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-21 02:43:48,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042874025] [2022-07-21 02:43:48,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:43:48,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:43:48,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:43:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 02:43:48,426 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) [2022-07-21 02:43:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:48,441 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-07-21 02:43:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:43:48,442 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 [2022-07-21 02:43:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:48,442 INFO L225 Difference]: With dead ends: 33 [2022-07-21 02:43:48,442 INFO L226 Difference]: Without dead ends: 21 [2022-07-21 02:43:48,443 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 [2022-07-21 02:43:48,444 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 [2022-07-21 02:43:48,444 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] [2022-07-21 02:43:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-21 02:43:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-07-21 02:43:48,446 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) [2022-07-21 02:43:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-07-21 02:43:48,447 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2022-07-21 02:43:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:48,447 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-07-21 02:43:48,447 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) [2022-07-21 02:43:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-07-21 02:43:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 02:43:48,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:48,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:48,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:48,661 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 [2022-07-21 02:43:48,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:48,662 INFO L85 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2022-07-21 02:43:48,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:48,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514959678] [2022-07-21 02:43:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:48,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514959678] [2022-07-21 02:43:48,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514959678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516164079] [2022-07-21 02:43:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:48,685 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) [2022-07-21 02:43:48,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:43:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:48,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 02:43:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:48,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:48,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516164079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:48,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:48,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-21 02:43:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844222125] [2022-07-21 02:43:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:43:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:43:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:43:48,785 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) [2022-07-21 02:43:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:48,823 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-21 02:43:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:43:48,824 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 [2022-07-21 02:43:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:48,825 INFO L225 Difference]: With dead ends: 38 [2022-07-21 02:43:48,825 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 02:43:48,825 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 [2022-07-21 02:43:48,826 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 [2022-07-21 02:43:48,826 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] [2022-07-21 02:43:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 02:43:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-21 02:43:48,829 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) [2022-07-21 02:43:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-21 02:43:48,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2022-07-21 02:43:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:48,829 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-21 02:43:48,829 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) [2022-07-21 02:43:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-21 02:43:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:43:48,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:48,830 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:48,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:49,032 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 [2022-07-21 02:43:49,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2114699077, now seen corresponding path program 2 times [2022-07-21 02:43:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:49,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190165091] [2022-07-21 02:43:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:49,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 02:43:49,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190165091] [2022-07-21 02:43:49,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190165091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263015133] [2022-07-21 02:43:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:43:49,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:49,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:49,109 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) [2022-07-21 02:43:49,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:43:49,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:43:49,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:49,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:43:49,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 02:43:49,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 02:43:49,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263015133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:49,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:49,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-21 02:43:49,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657886671] [2022-07-21 02:43:49,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:49,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 02:43:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 02:43:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:43:49,244 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) [2022-07-21 02:43:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:49,392 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2022-07-21 02:43:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:43:49,393 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 [2022-07-21 02:43:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:49,395 INFO L225 Difference]: With dead ends: 101 [2022-07-21 02:43:49,396 INFO L226 Difference]: Without dead ends: 79 [2022-07-21 02:43:49,396 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 [2022-07-21 02:43:49,400 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 [2022-07-21 02:43:49,400 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] [2022-07-21 02:43:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-21 02:43:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-07-21 02:43:49,409 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) [2022-07-21 02:43:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-07-21 02:43:49,420 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 21 [2022-07-21 02:43:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:49,421 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-07-21 02:43:49,421 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) [2022-07-21 02:43:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-07-21 02:43:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:43:49,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:49,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:49,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:49,631 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 [2022-07-21 02:43:49,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1372768635, now seen corresponding path program 1 times [2022-07-21 02:43:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136787270] [2022-07-21 02:43:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:49,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 02:43:49,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136787270] [2022-07-21 02:43:49,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136787270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:43:49,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:43:49,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 02:43:49,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651358200] [2022-07-21 02:43:49,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:43:49,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:43:49,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:49,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:43:49,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 02:43:49,668 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) [2022-07-21 02:43:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:49,732 INFO L93 Difference]: Finished difference Result 177 states and 228 transitions. [2022-07-21 02:43:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 02:43:49,733 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 [2022-07-21 02:43:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:49,739 INFO L225 Difference]: With dead ends: 177 [2022-07-21 02:43:49,739 INFO L226 Difference]: Without dead ends: 117 [2022-07-21 02:43:49,739 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 [2022-07-21 02:43:49,740 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 [2022-07-21 02:43:49,740 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] [2022-07-21 02:43:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-21 02:43:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2022-07-21 02:43:49,748 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) [2022-07-21 02:43:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-07-21 02:43:49,748 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 21 [2022-07-21 02:43:49,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:49,749 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-07-21 02:43:49,749 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) [2022-07-21 02:43:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-07-21 02:43:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:43:49,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:49,749 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:49,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 02:43:49,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 2 times [2022-07-21 02:43:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:49,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090736520] [2022-07-21 02:43:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:49,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:49,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:49,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090736520] [2022-07-21 02:43:49,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090736520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:49,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73021987] [2022-07-21 02:43:49,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:43:49,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:49,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:49,808 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) [2022-07-21 02:43:49,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:43:49,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:43:49,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 02:43:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:49,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:49,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73021987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:49,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:49,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-21 02:43:49,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259735603] [2022-07-21 02:43:49,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:49,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 02:43:49,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:49,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 02:43:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:43:49,945 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) [2022-07-21 02:43:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:50,016 INFO L93 Difference]: Finished difference Result 295 states and 395 transitions. [2022-07-21 02:43:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:43:50,017 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 [2022-07-21 02:43:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:50,019 INFO L225 Difference]: With dead ends: 295 [2022-07-21 02:43:50,019 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 02:43:50,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:43:50,020 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:50,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:43:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 02:43:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2022-07-21 02:43:50,033 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) [2022-07-21 02:43:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2022-07-21 02:43:50,035 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 21 [2022-07-21 02:43:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:50,035 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2022-07-21 02:43:50,036 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) [2022-07-21 02:43:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2022-07-21 02:43:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 02:43:50,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:50,037 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:50,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:50,251 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 [2022-07-21 02:43:50,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1505496997, now seen corresponding path program 3 times [2022-07-21 02:43:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209367278] [2022-07-21 02:43:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:50,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:50,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209367278] [2022-07-21 02:43:50,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209367278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184377169] [2022-07-21 02:43:50,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:43:50,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:50,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:50,355 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) [2022-07-21 02:43:50,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:43:50,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 02:43:50,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 02:43:50,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-21 02:43:50,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:43:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184377169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:43:50,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:43:50,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-07-21 02:43:50,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433160038] [2022-07-21 02:43:50,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:43:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:43:50,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:43:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:43:50,657 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) [2022-07-21 02:43:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:50,741 INFO L93 Difference]: Finished difference Result 509 states and 608 transitions. [2022-07-21 02:43:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:43:50,741 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 [2022-07-21 02:43:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:50,743 INFO L225 Difference]: With dead ends: 509 [2022-07-21 02:43:50,743 INFO L226 Difference]: Without dead ends: 507 [2022-07-21 02:43:50,743 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 [2022-07-21 02:43:50,744 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 [2022-07-21 02:43:50,744 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] [2022-07-21 02:43:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-07-21 02:43:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 319. [2022-07-21 02:43:50,759 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) [2022-07-21 02:43:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 377 transitions. [2022-07-21 02:43:50,761 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 377 transitions. Word has length 39 [2022-07-21 02:43:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:50,761 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 377 transitions. [2022-07-21 02:43:50,761 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) [2022-07-21 02:43:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 377 transitions. [2022-07-21 02:43:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 02:43:50,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:50,762 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:50,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:50,971 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 [2022-07-21 02:43:50,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:50,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash 557414361, now seen corresponding path program 1 times [2022-07-21 02:43:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580758713] [2022-07-21 02:43:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:50,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 118 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 02:43:51,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580758713] [2022-07-21 02:43:51,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580758713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574469901] [2022-07-21 02:43:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:51,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:51,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:51,051 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) [2022-07-21 02:43:51,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:43:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 02:43:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:51,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574469901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:51,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:51,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-07-21 02:43:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391899141] [2022-07-21 02:43:51,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:51,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 02:43:51,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 02:43:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 02:43:51,443 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) [2022-07-21 02:43:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:56,192 INFO L93 Difference]: Finished difference Result 2329 states and 2952 transitions. [2022-07-21 02:43:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-07-21 02:43:56,193 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 [2022-07-21 02:43:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:56,199 INFO L225 Difference]: With dead ends: 2329 [2022-07-21 02:43:56,199 INFO L226 Difference]: Without dead ends: 2122 [2022-07-21 02:43:56,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18399 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11743, Invalid=35999, Unknown=0, NotChecked=0, Total=47742 [2022-07-21 02:43:56,213 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:56,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 99 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:43:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-07-21 02:43:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 516. [2022-07-21 02:43:56,241 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) [2022-07-21 02:43:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 608 transitions. [2022-07-21 02:43:56,242 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 608 transitions. Word has length 39 [2022-07-21 02:43:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:56,242 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 608 transitions. [2022-07-21 02:43:56,243 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) [2022-07-21 02:43:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 608 transitions. [2022-07-21 02:43:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 02:43:56,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:56,245 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:56,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 02:43:56,461 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 [2022-07-21 02:43:56,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -244493731, now seen corresponding path program 2 times [2022-07-21 02:43:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:56,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088013447] [2022-07-21 02:43:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:56,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:56,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088013447] [2022-07-21 02:43:56,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088013447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:56,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198260002] [2022-07-21 02:43:56,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:43:56,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:56,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:56,687 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) [2022-07-21 02:43:56,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 02:43:56,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:43:56,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 02:43:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:56,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:57,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198260002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:57,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:57,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 52 [2022-07-21 02:43:57,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663311155] [2022-07-21 02:43:57,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:57,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 02:43:57,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 02:43:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1512, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 02:43:57,476 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) [2022-07-21 02:43:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:59,707 INFO L93 Difference]: Finished difference Result 3286 states and 4211 transitions. [2022-07-21 02:43:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-07-21 02:43:59,707 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 [2022-07-21 02:43:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:59,714 INFO L225 Difference]: With dead ends: 3286 [2022-07-21 02:43:59,714 INFO L226 Difference]: Without dead ends: 2982 [2022-07-21 02:43:59,718 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 [2022-07-21 02:43:59,719 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:59,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 76 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:43:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-07-21 02:43:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1331. [2022-07-21 02:43:59,786 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) [2022-07-21 02:43:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1604 transitions. [2022-07-21 02:43:59,788 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1604 transitions. Word has length 75 [2022-07-21 02:43:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:59,789 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1604 transitions. [2022-07-21 02:43:59,789 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) [2022-07-21 02:43:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1604 transitions. [2022-07-21 02:43:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-21 02:43:59,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:59,791 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:59,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:00,008 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 [2022-07-21 02:44:00,008 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 176530048, now seen corresponding path program 1 times [2022-07-21 02:44:00,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:00,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835265267] [2022-07-21 02:44:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:00,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-07-21 02:44:00,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:00,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835265267] [2022-07-21 02:44:00,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835265267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:44:00,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:44:00,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:44:00,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622060262] [2022-07-21 02:44:00,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:44:00,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:44:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:44:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:44:00,082 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) [2022-07-21 02:44:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:00,139 INFO L93 Difference]: Finished difference Result 2230 states and 2713 transitions. [2022-07-21 02:44:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:44:00,139 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 [2022-07-21 02:44:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:00,142 INFO L225 Difference]: With dead ends: 2230 [2022-07-21 02:44:00,143 INFO L226 Difference]: Without dead ends: 1357 [2022-07-21 02:44:00,144 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 [2022-07-21 02:44:00,144 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 [2022-07-21 02:44:00,144 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] [2022-07-21 02:44:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-07-21 02:44:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1327. [2022-07-21 02:44:00,195 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) [2022-07-21 02:44:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1596 transitions. [2022-07-21 02:44:00,198 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1596 transitions. Word has length 144 [2022-07-21 02:44:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:00,199 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1596 transitions. [2022-07-21 02:44:00,199 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) [2022-07-21 02:44:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1596 transitions. [2022-07-21 02:44:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-21 02:44:00,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:00,201 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:00,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 02:44:00,201 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:00,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2130462941, now seen corresponding path program 3 times [2022-07-21 02:44:00,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:00,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428728091] [2022-07-21 02:44:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:00,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:00,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:00,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428728091] [2022-07-21 02:44:00,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428728091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:00,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692008972] [2022-07-21 02:44:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:44:00,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:00,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:00,944 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) [2022-07-21 02:44:00,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 02:44:00,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 02:44:00,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:00,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 02:44:00,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-07-21 02:44:01,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:44:01,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692008972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:44:01,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:44:01,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [49] total 55 [2022-07-21 02:44:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130372206] [2022-07-21 02:44:01,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:44:01,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:44:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:44:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1778, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 02:44:01,469 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) [2022-07-21 02:44:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:01,647 INFO L93 Difference]: Finished difference Result 1784 states and 2117 transitions. [2022-07-21 02:44:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 02:44:01,648 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 [2022-07-21 02:44:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:01,652 INFO L225 Difference]: With dead ends: 1784 [2022-07-21 02:44:01,652 INFO L226 Difference]: Without dead ends: 1782 [2022-07-21 02:44:01,652 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 [2022-07-21 02:44:01,653 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:01,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:44:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-07-21 02:44:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1327. [2022-07-21 02:44:01,721 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) [2022-07-21 02:44:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1596 transitions. [2022-07-21 02:44:01,722 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1596 transitions. Word has length 147 [2022-07-21 02:44:01,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:01,723 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1596 transitions. [2022-07-21 02:44:01,723 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) [2022-07-21 02:44:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1596 transitions. [2022-07-21 02:44:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-21 02:44:01,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:01,726 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:01,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:01,932 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 [2022-07-21 02:44:01,932 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 245147366, now seen corresponding path program 1 times [2022-07-21 02:44:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:01,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355722847] [2022-07-21 02:44:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-07-21 02:44:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355722847] [2022-07-21 02:44:02,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355722847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771180595] [2022-07-21 02:44:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:02,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:02,636 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) [2022-07-21 02:44:02,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 02:44:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 02:44:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-07-21 02:44:02,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-07-21 02:44:04,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771180595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:04,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:04,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-07-21 02:44:04,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586718304] [2022-07-21 02:44:04,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:04,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-21 02:44:04,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-21 02:44:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2022-07-21 02:44:04,745 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) [2022-07-21 02:44:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:05,794 INFO L93 Difference]: Finished difference Result 10053 states and 11687 transitions. [2022-07-21 02:44:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-21 02:44:05,795 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 [2022-07-21 02:44:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:05,812 INFO L225 Difference]: With dead ends: 10053 [2022-07-21 02:44:05,812 INFO L226 Difference]: Without dead ends: 9165 [2022-07-21 02:44:05,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2022-07-21 02:44:05,815 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 [2022-07-21 02:44:05,815 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] [2022-07-21 02:44:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9165 states. [2022-07-21 02:44:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9165 to 2267. [2022-07-21 02:44:06,058 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) [2022-07-21 02:44:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2661 transitions. [2022-07-21 02:44:06,061 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2661 transitions. Word has length 286 [2022-07-21 02:44:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:06,061 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 2661 transitions. [2022-07-21 02:44:06,062 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) [2022-07-21 02:44:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2661 transitions. [2022-07-21 02:44:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-07-21 02:44:06,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:06,069 INFO L195 NwaCegarLoop]: trace histogram [184, 184, 182, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:06,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:06,295 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 [2022-07-21 02:44:06,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash 540978050, now seen corresponding path program 2 times [2022-07-21 02:44:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286026721] [2022-07-21 02:44:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:06,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-07-21 02:44:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:08,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286026721] [2022-07-21 02:44:08,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286026721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:08,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567171842] [2022-07-21 02:44:08,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:44:08,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:08,916 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) [2022-07-21 02:44:08,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 02:44:09,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:44:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-21 02:44:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-07-21 02:44:09,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-07-21 02:44:16,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567171842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:16,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:16,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-07-21 02:44:16,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172615698] [2022-07-21 02:44:16,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:16,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-07-21 02:44:16,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-07-21 02:44:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2022-07-21 02:44:16,475 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) [2022-07-21 02:44:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:21,434 INFO L93 Difference]: Finished difference Result 18863 states and 21993 transitions. [2022-07-21 02:44:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-07-21 02:44:21,435 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 [2022-07-21 02:44:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:21,469 INFO L225 Difference]: With dead ends: 18863 [2022-07-21 02:44:21,469 INFO L226 Difference]: Without dead ends: 17437 [2022-07-21 02:44:21,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2022-07-21 02:44:21,475 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:21,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 47 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 02:44:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2022-07-21 02:44:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 4523. [2022-07-21 02:44:22,339 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) [2022-07-21 02:44:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 5293 transitions. [2022-07-21 02:44:22,344 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 5293 transitions. Word has length 568 [2022-07-21 02:44:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:22,345 INFO L495 AbstractCegarLoop]: Abstraction has 4523 states and 5293 transitions. [2022-07-21 02:44:22,345 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) [2022-07-21 02:44:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 5293 transitions. [2022-07-21 02:44:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1133 [2022-07-21 02:44:22,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:22,389 INFO L195 NwaCegarLoop]: trace histogram [372, 372, 370, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:22,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:22,603 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 [2022-07-21 02:44:22,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1619735746, now seen corresponding path program 3 times [2022-07-21 02:44:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309252737] [2022-07-21 02:44:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 104162 proven. 51801 refuted. 0 times theorem prover too weak. 51805 trivial. 0 not checked. [2022-07-21 02:44:32,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309252737] [2022-07-21 02:44:32,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309252737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055531637] [2022-07-21 02:44:32,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:44:32,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:32,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:32,261 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) [2022-07-21 02:44:32,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 02:44:32,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 02:44:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:44:32,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 556 proven. 104166 refuted. 0 times theorem prover too weak. 103046 trivial. 0 not checked. [2022-07-21 02:44:35,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 3 proven. 1116 refuted. 0 times theorem prover too weak. 206649 trivial. 0 not checked. [2022-07-21 02:44:36,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055531637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:36,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:36,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [189, 9, 7] total 200 [2022-07-21 02:44:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626011446] [2022-07-21 02:44:36,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:36,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-07-21 02:44:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:36,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-07-21 02:44:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18183, Invalid=21617, Unknown=0, NotChecked=0, Total=39800 [2022-07-21 02:44:36,745 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) [2022-07-21 02:45:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:35,646 INFO L93 Difference]: Finished difference Result 12501 states and 14502 transitions. [2022-07-21 02:45:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. [2022-07-21 02:45:35,647 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 [2022-07-21 02:45:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:35,648 INFO L225 Difference]: With dead ends: 12501 [2022-07-21 02:45:35,648 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 02:45:35,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3023 GetRequests, 2251 SyntacticMatches, 3 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166156 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=146170, Invalid=447500, Unknown=0, NotChecked=0, Total=593670 [2022-07-21 02:45:35,682 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5549 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 1154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:35,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5549 Valid, 39 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1154 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 02:45:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 02:45:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 02:45:35,683 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) [2022-07-21 02:45:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 02:45:35,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1132 [2022-07-21 02:45:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:35,684 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 02:45:35,684 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) [2022-07-21 02:45:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 02:45:35,684 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 02:45:35,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:45:35,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 02:45:35,903 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 [2022-07-21 02:45:35,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.