./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/eca-rers2012/Problem12_label32.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 d6a56bada7206875b5522c4732ed558727da026e7bf600ff2a0cdce747605d25 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:12:39,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:12:39,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:12:39,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:12:39,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:12:39,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:12:39,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:12:39,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:12:39,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:12:39,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:12:39,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:12:39,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:12:39,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:12:39,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:12:39,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:12:39,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:12:39,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:12:39,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:12:39,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:12:39,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:12:39,532 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:12:39,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:12:39,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:12:39,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:12:39,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:12:39,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:12:39,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:12:39,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:12:39,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:12:39,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:12:39,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:12:39,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:12:39,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:12:39,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:12:39,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:12:39,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:12:39,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:12:39,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:12:39,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:12:39,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:12:39,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:12:39,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:12:39,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:12:39,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:12:39,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:12:39,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:12:39,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:12:39,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:12:39,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:12:39,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:12:39,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:12:39,591 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:12:39,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:12:39,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:12:39,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:12:39,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:12:39,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:12:39,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:12:39,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:12:39,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:12:39,594 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:12:39,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:12:39,594 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:12:39,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:12:39,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:12:39,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:12:39,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:12:39,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:12:39,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:12:39,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:12:39,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:12:39,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:12:39,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:12:39,597 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:12:39,598 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:12:39,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:12:39,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a56bada7206875b5522c4732ed558727da026e7bf600ff2a0cdce747605d25 [2022-07-19 12:12:39,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:12:39,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:12:39,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:12:39,843 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:12:39,844 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:12:39,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label32.c [2022-07-19 12:12:39,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d902e3ad/402bffe935c5498788beca34a7892e70/FLAGb31b0d6f5 [2022-07-19 12:12:40,575 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:12:40,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label32.c [2022-07-19 12:12:40,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d902e3ad/402bffe935c5498788beca34a7892e70/FLAGb31b0d6f5 [2022-07-19 12:12:40,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d902e3ad/402bffe935c5498788beca34a7892e70 [2022-07-19 12:12:40,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:12:40,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:12:40,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:12:40,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:12:40,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:12:40,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:12:40" (1/1) ... [2022-07-19 12:12:40,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@308d4bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:40, skipping insertion in model container [2022-07-19 12:12:40,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:12:40" (1/1) ... [2022-07-19 12:12:40,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:12:40,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:12:41,085 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/eca-rers2012/Problem12_label32.c[5470,5483] [2022-07-19 12:12:41,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:12:41,862 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:12:41,890 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/eca-rers2012/Problem12_label32.c[5470,5483] [2022-07-19 12:12:42,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:12:42,258 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:12:42,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42 WrapperNode [2022-07-19 12:12:42,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:12:42,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:12:42,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:12:42,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:12:42,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:42,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:42,621 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-19 12:12:42,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:12:42,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:12:42,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:12:42,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:12:42,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:42,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:42,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:42,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:42,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:42,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:43,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:43,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:12:43,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:12:43,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:12:43,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:12:43,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (1/1) ... [2022-07-19 12:12:43,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:12:43,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:12:43,169 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) [2022-07-19 12:12:43,193 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 [2022-07-19 12:12:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:12:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:12:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:12:43,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:12:43,340 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:12:43,341 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:12:46,733 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:12:46,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:12:46,744 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:12:46,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:12:46 BoogieIcfgContainer [2022-07-19 12:12:46,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:12:46,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:12:46,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:12:46,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:12:46,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:12:40" (1/3) ... [2022-07-19 12:12:46,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dfc022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:12:46, skipping insertion in model container [2022-07-19 12:12:46,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:12:42" (2/3) ... [2022-07-19 12:12:46,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dfc022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:12:46, skipping insertion in model container [2022-07-19 12:12:46,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:12:46" (3/3) ... [2022-07-19 12:12:46,753 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label32.c [2022-07-19 12:12:46,764 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:12:46,764 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:12:46,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:12:46,834 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@2dcf6fd0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26186711 [2022-07-19 12:12:46,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:12:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 12:12:46,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:12:46,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:12:46,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:12:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:12:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2022-07-19 12:12:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:12:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123268496] [2022-07-19 12:12:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:12:46,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:12:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:12:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:12:47,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:12:47,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123268496] [2022-07-19 12:12:47,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123268496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:12:47,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:12:47,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:12:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639024633] [2022-07-19 12:12:47,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:12:47,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:12:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:12:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:12:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:12:47,111 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:12:50,668 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-07-19 12:12:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:12:50,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 12:12:50,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:12:50,689 INFO L225 Difference]: With dead ends: 2388 [2022-07-19 12:12:50,689 INFO L226 Difference]: Without dead ends: 1506 [2022-07-19 12:12:50,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:12:50,697 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 793 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:12:50,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 112 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 12:12:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-19 12:12:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-19 12:12:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.86578073089701) internal successors, (2808), 1505 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2808 transitions. [2022-07-19 12:12:50,798 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2808 transitions. Word has length 43 [2022-07-19 12:12:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:12:50,798 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2808 transitions. [2022-07-19 12:12:50,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2808 transitions. [2022-07-19 12:12:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-19 12:12:50,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:12:50,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:12:50,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:12:50,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:12:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:12:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1973974140, now seen corresponding path program 1 times [2022-07-19 12:12:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:12:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434044827] [2022-07-19 12:12:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:12:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:12:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:12:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:12:50,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:12:50,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434044827] [2022-07-19 12:12:50,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434044827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:12:50,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:12:50,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:12:50,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809231258] [2022-07-19 12:12:50,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:12:50,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:12:50,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:12:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:12:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:12:50,992 INFO L87 Difference]: Start difference. First operand 1506 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:12:55,988 INFO L93 Difference]: Finished difference Result 5271 states and 9796 transitions. [2022-07-19 12:12:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 12:12:55,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-19 12:12:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:12:56,002 INFO L225 Difference]: With dead ends: 5271 [2022-07-19 12:12:56,003 INFO L226 Difference]: Without dead ends: 3767 [2022-07-19 12:12:56,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:12:56,010 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 2307 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2307 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 5146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:12:56,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2307 Valid, 197 Invalid, 5146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 12:12:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2022-07-19 12:12:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2022-07-19 12:12:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.6056412985630655) internal successors, (6034), 3758 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6034 transitions. [2022-07-19 12:12:56,101 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6034 transitions. Word has length 108 [2022-07-19 12:12:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:12:56,105 INFO L495 AbstractCegarLoop]: Abstraction has 3759 states and 6034 transitions. [2022-07-19 12:12:56,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6034 transitions. [2022-07-19 12:12:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-19 12:12:56,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:12:56,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:12:56,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:12:56,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:12:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:12:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1709599411, now seen corresponding path program 1 times [2022-07-19 12:12:56,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:12:56,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017965769] [2022-07-19 12:12:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:12:56,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:12:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:12:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:12:56,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:12:56,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017965769] [2022-07-19 12:12:56,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017965769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:12:56,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:12:56,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:12:56,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289362566] [2022-07-19 12:12:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:12:56,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:12:56,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:12:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:12:56,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:12:56,328 INFO L87 Difference]: Start difference. First operand 3759 states and 6034 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:12:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:12:59,907 INFO L93 Difference]: Finished difference Result 10557 states and 17377 transitions. [2022-07-19 12:12:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:12:59,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-19 12:12:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:12:59,930 INFO L225 Difference]: With dead ends: 10557 [2022-07-19 12:12:59,930 INFO L226 Difference]: Without dead ends: 6763 [2022-07-19 12:12:59,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:12:59,940 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3804 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 4468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 3804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:12:59,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 712 Invalid, 4468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 3804 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-19 12:12:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-07-19 12:13:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-07-19 12:13:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3571428571428572) internal successors, (9177), 6762 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9177 transitions. [2022-07-19 12:13:00,063 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9177 transitions. Word has length 114 [2022-07-19 12:13:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:00,065 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 9177 transitions. [2022-07-19 12:13:00,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9177 transitions. [2022-07-19 12:13:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-19 12:13:00,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:00,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:00,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:13:00,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash 37444428, now seen corresponding path program 1 times [2022-07-19 12:13:00,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321217560] [2022-07-19 12:13:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:00,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:00,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:00,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321217560] [2022-07-19 12:13:00,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321217560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:13:00,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387878654] [2022-07-19 12:13:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:00,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:13:00,266 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) [2022-07-19 12:13:00,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:13:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:00,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:13:00,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:13:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 12:13:00,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:13:00,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387878654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:00,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:13:00,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 12:13:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404695905] [2022-07-19 12:13:00,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:00,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:13:00,619 INFO L87 Difference]: Start difference. First operand 6763 states and 9177 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:03,229 INFO L93 Difference]: Finished difference Result 18030 states and 25115 transitions. [2022-07-19 12:13:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:03,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-07-19 12:13:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:03,269 INFO L225 Difference]: With dead ends: 18030 [2022-07-19 12:13:03,270 INFO L226 Difference]: Without dead ends: 11269 [2022-07-19 12:13:03,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:13:03,281 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 689 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:03,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 242 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:13:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2022-07-19 12:13:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 9767. [2022-07-19 12:13:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.4348761007577309) internal successors, (14013), 9766 states have internal predecessors, (14013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 14013 transitions. [2022-07-19 12:13:03,476 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 14013 transitions. Word has length 188 [2022-07-19 12:13:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:03,477 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 14013 transitions. [2022-07-19 12:13:03,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 14013 transitions. [2022-07-19 12:13:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-19 12:13:03,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:03,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:03,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:13:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:03,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1188783154, now seen corresponding path program 1 times [2022-07-19 12:13:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:03,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317951744] [2022-07-19 12:13:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 12:13:03,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:03,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317951744] [2022-07-19 12:13:03,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317951744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:03,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:03,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016442185] [2022-07-19 12:13:03,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:03,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:13:03,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:13:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:13:03,924 INFO L87 Difference]: Start difference. First operand 9767 states and 14013 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:07,293 INFO L93 Difference]: Finished difference Result 25579 states and 38024 transitions. [2022-07-19 12:13:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:13:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-07-19 12:13:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:07,334 INFO L225 Difference]: With dead ends: 25579 [2022-07-19 12:13:07,334 INFO L226 Difference]: Without dead ends: 15777 [2022-07-19 12:13:07,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:13:07,348 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3813 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 4355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:07,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 402 Invalid, 4355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3813 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:13:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2022-07-19 12:13:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 14273. [2022-07-19 12:13:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.389784192825112) internal successors, (19835), 14272 states have internal predecessors, (19835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 19835 transitions. [2022-07-19 12:13:07,609 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 19835 transitions. Word has length 255 [2022-07-19 12:13:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:07,610 INFO L495 AbstractCegarLoop]: Abstraction has 14273 states and 19835 transitions. [2022-07-19 12:13:07,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 19835 transitions. [2022-07-19 12:13:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-07-19 12:13:07,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:07,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:07,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:13:07,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1755489975, now seen corresponding path program 1 times [2022-07-19 12:13:07,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:07,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341291256] [2022-07-19 12:13:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:07,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-19 12:13:07,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:07,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341291256] [2022-07-19 12:13:07,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341291256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:07,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:07,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:13:07,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414690681] [2022-07-19 12:13:07,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:07,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:07,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:07,782 INFO L87 Difference]: Start difference. First operand 14273 states and 19835 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:10,365 INFO L93 Difference]: Finished difference Result 36054 states and 50017 transitions. [2022-07-19 12:13:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:10,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 277 [2022-07-19 12:13:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:10,403 INFO L225 Difference]: With dead ends: 36054 [2022-07-19 12:13:10,403 INFO L226 Difference]: Without dead ends: 21783 [2022-07-19 12:13:10,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:10,420 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 694 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:10,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 422 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:13:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21783 states. [2022-07-19 12:13:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21783 to 18779. [2022-07-19 12:13:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.2279262967302162) internal successors, (23058), 18778 states have internal predecessors, (23058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 23058 transitions. [2022-07-19 12:13:10,647 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 23058 transitions. Word has length 277 [2022-07-19 12:13:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:10,648 INFO L495 AbstractCegarLoop]: Abstraction has 18779 states and 23058 transitions. [2022-07-19 12:13:10,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 23058 transitions. [2022-07-19 12:13:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-07-19 12:13:10,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:10,654 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:13:10,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2041064325, now seen corresponding path program 1 times [2022-07-19 12:13:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:10,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960561038] [2022-07-19 12:13:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 12:13:10,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960561038] [2022-07-19 12:13:10,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960561038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:10,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:10,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:10,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889456051] [2022-07-19 12:13:10,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:10,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:10,835 INFO L87 Difference]: Start difference. First operand 18779 states and 23058 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:13,485 INFO L93 Difference]: Finished difference Result 45817 states and 57283 transitions. [2022-07-19 12:13:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:13,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2022-07-19 12:13:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:13,531 INFO L225 Difference]: With dead ends: 45817 [2022-07-19 12:13:13,532 INFO L226 Difference]: Without dead ends: 27040 [2022-07-19 12:13:13,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:13,552 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 840 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 840 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:13,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [840 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:13:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2022-07-19 12:13:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 27040. [2022-07-19 12:13:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.243463145826399) internal successors, (33622), 27039 states have internal predecessors, (33622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 33622 transitions. [2022-07-19 12:13:13,877 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 33622 transitions. Word has length 356 [2022-07-19 12:13:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:13,880 INFO L495 AbstractCegarLoop]: Abstraction has 27040 states and 33622 transitions. [2022-07-19 12:13:13,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 33622 transitions. [2022-07-19 12:13:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-07-19 12:13:13,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:13,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:13,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:13:13,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1545703729, now seen corresponding path program 1 times [2022-07-19 12:13:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:13,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920383086] [2022-07-19 12:13:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 122 proven. 108 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-19 12:13:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920383086] [2022-07-19 12:13:14,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920383086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:13:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582053352] [2022-07-19 12:13:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:14,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:13:14,059 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) [2022-07-19 12:13:14,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:13:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:13:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:13:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 12:13:14,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:13:14,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582053352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:14,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:13:14,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 12:13:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683796892] [2022-07-19 12:13:14,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:14,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:13:14,332 INFO L87 Difference]: Start difference. First operand 27040 states and 33622 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:16,727 INFO L93 Difference]: Finished difference Result 61588 states and 77003 transitions. [2022-07-19 12:13:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:16,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 360 [2022-07-19 12:13:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:16,777 INFO L225 Difference]: With dead ends: 61588 [2022-07-19 12:13:16,778 INFO L226 Difference]: Without dead ends: 34550 [2022-07-19 12:13:16,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:13:16,805 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 761 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:16,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 235 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:13:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2022-07-19 12:13:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 34550. [2022-07-19 12:13:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.2338707343193724) internal successors, (42629), 34549 states have internal predecessors, (42629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 42629 transitions. [2022-07-19 12:13:17,326 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 42629 transitions. Word has length 360 [2022-07-19 12:13:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:17,326 INFO L495 AbstractCegarLoop]: Abstraction has 34550 states and 42629 transitions. [2022-07-19 12:13:17,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 42629 transitions. [2022-07-19 12:13:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-07-19 12:13:17,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:17,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:17,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:13:17,557 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,SelfDestructingSolverStorable7 [2022-07-19 12:13:17,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:17,558 INFO L85 PathProgramCache]: Analyzing trace with hash -671244681, now seen corresponding path program 1 times [2022-07-19 12:13:17,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:17,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234615957] [2022-07-19 12:13:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-19 12:13:17,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:17,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234615957] [2022-07-19 12:13:17,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234615957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:17,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:17,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:17,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053719356] [2022-07-19 12:13:17,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:17,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:17,820 INFO L87 Difference]: Start difference. First operand 34550 states and 42629 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:20,640 INFO L93 Difference]: Finished difference Result 85620 states and 105162 transitions. [2022-07-19 12:13:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:20,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 371 [2022-07-19 12:13:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:20,723 INFO L225 Difference]: With dead ends: 85620 [2022-07-19 12:13:20,724 INFO L226 Difference]: Without dead ends: 51072 [2022-07-19 12:13:20,754 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 [2022-07-19 12:13:20,755 INFO L413 NwaCegarLoop]: 1352 mSDtfsCounter, 728 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:20,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1360 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:13:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51072 states. [2022-07-19 12:13:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51072 to 49570. [2022-07-19 12:13:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49570 states, 49569 states have (on average 1.1941737779660675) internal successors, (59194), 49569 states have internal predecessors, (59194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49570 states to 49570 states and 59194 transitions. [2022-07-19 12:13:21,610 INFO L78 Accepts]: Start accepts. Automaton has 49570 states and 59194 transitions. Word has length 371 [2022-07-19 12:13:21,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:21,611 INFO L495 AbstractCegarLoop]: Abstraction has 49570 states and 59194 transitions. [2022-07-19 12:13:21,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 49570 states and 59194 transitions. [2022-07-19 12:13:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-07-19 12:13:21,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:21,621 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:21,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:13:21,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:21,622 INFO L85 PathProgramCache]: Analyzing trace with hash -564373778, now seen corresponding path program 1 times [2022-07-19 12:13:21,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:21,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018293252] [2022-07-19 12:13:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:21,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-19 12:13:21,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:21,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018293252] [2022-07-19 12:13:21,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018293252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:21,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:21,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119654972] [2022-07-19 12:13:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:21,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:21,894 INFO L87 Difference]: Start difference. First operand 49570 states and 59194 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:24,927 INFO L93 Difference]: Finished difference Result 120917 states and 144542 transitions. [2022-07-19 12:13:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 460 [2022-07-19 12:13:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:25,014 INFO L225 Difference]: With dead ends: 120917 [2022-07-19 12:13:25,014 INFO L226 Difference]: Without dead ends: 71349 [2022-07-19 12:13:25,050 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 [2022-07-19 12:13:25,051 INFO L413 NwaCegarLoop]: 1309 mSDtfsCounter, 639 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:25,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1317 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:13:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71349 states. [2022-07-19 12:13:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71349 to 70598. [2022-07-19 12:13:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70598 states, 70597 states have (on average 1.1828831253452696) internal successors, (83508), 70597 states have internal predecessors, (83508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70598 states to 70598 states and 83508 transitions. [2022-07-19 12:13:25,917 INFO L78 Accepts]: Start accepts. Automaton has 70598 states and 83508 transitions. Word has length 460 [2022-07-19 12:13:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:25,917 INFO L495 AbstractCegarLoop]: Abstraction has 70598 states and 83508 transitions. [2022-07-19 12:13:25,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 70598 states and 83508 transitions. [2022-07-19 12:13:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-07-19 12:13:25,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:25,929 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:25,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:13:25,929 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash -877459784, now seen corresponding path program 1 times [2022-07-19 12:13:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:25,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991271619] [2022-07-19 12:13:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-19 12:13:26,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:26,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991271619] [2022-07-19 12:13:26,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991271619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:26,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:26,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:26,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950898095] [2022-07-19 12:13:26,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:26,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:26,255 INFO L87 Difference]: Start difference. First operand 70598 states and 83508 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:29,027 INFO L93 Difference]: Finished difference Result 144949 states and 170856 transitions. [2022-07-19 12:13:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 464 [2022-07-19 12:13:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:29,105 INFO L225 Difference]: With dead ends: 144949 [2022-07-19 12:13:29,105 INFO L226 Difference]: Without dead ends: 69847 [2022-07-19 12:13:29,151 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 [2022-07-19 12:13:29,151 INFO L413 NwaCegarLoop]: 1209 mSDtfsCounter, 725 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:29,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 1217 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 12:13:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69847 states. [2022-07-19 12:13:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69847 to 62337. [2022-07-19 12:13:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62337 states, 62336 states have (on average 1.1272458932238194) internal successors, (70268), 62336 states have internal predecessors, (70268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 70268 transitions. [2022-07-19 12:13:29,880 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 70268 transitions. Word has length 464 [2022-07-19 12:13:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:29,881 INFO L495 AbstractCegarLoop]: Abstraction has 62337 states and 70268 transitions. [2022-07-19 12:13:29,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 70268 transitions. [2022-07-19 12:13:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-07-19 12:13:29,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:29,892 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:29,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:13:29,893 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:29,893 INFO L85 PathProgramCache]: Analyzing trace with hash 598408123, now seen corresponding path program 1 times [2022-07-19 12:13:29,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:29,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800503065] [2022-07-19 12:13:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:29,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 408 proven. 108 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-19 12:13:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800503065] [2022-07-19 12:13:30,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800503065] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:13:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389572846] [2022-07-19 12:13:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:30,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:13:30,162 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) [2022-07-19 12:13:30,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:13:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:13:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:13:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 449 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-19 12:13:30,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:13:30,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389572846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:30,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:13:30,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 12:13:30,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458743792] [2022-07-19 12:13:30,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:30,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:30,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:13:30,684 INFO L87 Difference]: Start difference. First operand 62337 states and 70268 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:33,354 INFO L93 Difference]: Finished difference Result 123921 states and 139778 transitions. [2022-07-19 12:13:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 530 [2022-07-19 12:13:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:33,425 INFO L225 Difference]: With dead ends: 123921 [2022-07-19 12:13:33,426 INFO L226 Difference]: Without dead ends: 62337 [2022-07-19 12:13:33,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:13:33,462 INFO L413 NwaCegarLoop]: 1294 mSDtfsCounter, 685 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:33,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1302 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 12:13:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2022-07-19 12:13:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 60084. [2022-07-19 12:13:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60084 states, 60083 states have (on average 1.0938368590117005) internal successors, (65721), 60083 states have internal predecessors, (65721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60084 states to 60084 states and 65721 transitions. [2022-07-19 12:13:34,184 INFO L78 Accepts]: Start accepts. Automaton has 60084 states and 65721 transitions. Word has length 530 [2022-07-19 12:13:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:34,185 INFO L495 AbstractCegarLoop]: Abstraction has 60084 states and 65721 transitions. [2022-07-19 12:13:34,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 60084 states and 65721 transitions. [2022-07-19 12:13:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-07-19 12:13:34,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:34,200 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:34,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:13:34,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:34,401 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1299614349, now seen corresponding path program 1 times [2022-07-19 12:13:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:34,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742442286] [2022-07-19 12:13:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:34,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-07-19 12:13:34,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:34,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742442286] [2022-07-19 12:13:34,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742442286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:34,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:34,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:34,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801830309] [2022-07-19 12:13:34,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:13:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:34,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:13:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:13:34,673 INFO L87 Difference]: Start difference. First operand 60084 states and 65721 transitions. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:39,503 INFO L93 Difference]: Finished difference Result 180997 states and 199293 transitions. [2022-07-19 12:13:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:13:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 611 [2022-07-19 12:13:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:39,824 INFO L225 Difference]: With dead ends: 180997 [2022-07-19 12:13:39,824 INFO L226 Difference]: Without dead ends: 121666 [2022-07-19 12:13:39,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:13:39,849 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1693 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 5216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:39,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1693 Valid, 57 Invalid, 5216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-19 12:13:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121666 states. [2022-07-19 12:13:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121666 to 120915. [2022-07-19 12:13:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120915 states, 120914 states have (on average 1.0979125659559688) internal successors, (132753), 120914 states have internal predecessors, (132753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120915 states to 120915 states and 132753 transitions. [2022-07-19 12:13:41,413 INFO L78 Accepts]: Start accepts. Automaton has 120915 states and 132753 transitions. Word has length 611 [2022-07-19 12:13:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:41,415 INFO L495 AbstractCegarLoop]: Abstraction has 120915 states and 132753 transitions. [2022-07-19 12:13:41,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 120915 states and 132753 transitions. [2022-07-19 12:13:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2022-07-19 12:13:41,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:41,452 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:41,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:13:41,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash -784186689, now seen corresponding path program 1 times [2022-07-19 12:13:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901530948] [2022-07-19 12:13:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:41,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-19 12:13:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901530948] [2022-07-19 12:13:42,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901530948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:42,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:42,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:42,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270377368] [2022-07-19 12:13:42,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:42,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:42,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:42,033 INFO L87 Difference]: Start difference. First operand 120915 states and 132753 transitions. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:45,224 INFO L93 Difference]: Finished difference Result 244081 states and 267793 transitions. [2022-07-19 12:13:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:45,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 618 [2022-07-19 12:13:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:45,412 INFO L225 Difference]: With dead ends: 244081 [2022-07-19 12:13:45,413 INFO L226 Difference]: Without dead ends: 123919 [2022-07-19 12:13:45,476 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 [2022-07-19 12:13:45,476 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 735 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:45,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 162 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 12:13:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123919 states. [2022-07-19 12:13:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123919 to 120915. [2022-07-19 12:13:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120915 states, 120914 states have (on average 1.0912053194832692) internal successors, (131942), 120914 states have internal predecessors, (131942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120915 states to 120915 states and 131942 transitions. [2022-07-19 12:13:47,296 INFO L78 Accepts]: Start accepts. Automaton has 120915 states and 131942 transitions. Word has length 618 [2022-07-19 12:13:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:47,296 INFO L495 AbstractCegarLoop]: Abstraction has 120915 states and 131942 transitions. [2022-07-19 12:13:47,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 120915 states and 131942 transitions. [2022-07-19 12:13:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2022-07-19 12:13:47,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:47,655 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:47,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:13:47,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash -18168460, now seen corresponding path program 1 times [2022-07-19 12:13:47,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:47,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098559244] [2022-07-19 12:13:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:47,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-07-19 12:13:47,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:47,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098559244] [2022-07-19 12:13:47,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098559244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:47,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:47,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:47,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973325050] [2022-07-19 12:13:47,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:47,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:47,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:47,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:47,935 INFO L87 Difference]: Start difference. First operand 120915 states and 131942 transitions. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:51,468 INFO L93 Difference]: Finished difference Result 319181 states and 347935 transitions. [2022-07-19 12:13:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 656 [2022-07-19 12:13:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:52,038 INFO L225 Difference]: With dead ends: 319181 [2022-07-19 12:13:52,038 INFO L226 Difference]: Without dead ends: 199019 [2022-07-19 12:13:52,115 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 [2022-07-19 12:13:52,117 INFO L413 NwaCegarLoop]: 1269 mSDtfsCounter, 484 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:52,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1276 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:13:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199019 states. [2022-07-19 12:13:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199019 to 177991. [2022-07-19 12:13:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177991 states, 177990 states have (on average 1.0754649137592) internal successors, (191422), 177990 states have internal predecessors, (191422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177991 states to 177991 states and 191422 transitions. [2022-07-19 12:13:54,559 INFO L78 Accepts]: Start accepts. Automaton has 177991 states and 191422 transitions. Word has length 656 [2022-07-19 12:13:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:54,559 INFO L495 AbstractCegarLoop]: Abstraction has 177991 states and 191422 transitions. [2022-07-19 12:13:54,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 177991 states and 191422 transitions. [2022-07-19 12:13:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2022-07-19 12:13:54,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:54,598 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:54,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:13:54,599 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:54,599 INFO L85 PathProgramCache]: Analyzing trace with hash -728818711, now seen corresponding path program 1 times [2022-07-19 12:13:54,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:54,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643614097] [2022-07-19 12:13:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:54,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-19 12:13:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:55,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643614097] [2022-07-19 12:13:55,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643614097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:55,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:55,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881388432] [2022-07-19 12:13:55,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:55,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:55,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:55,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:55,283 INFO L87 Difference]: Start difference. First operand 177991 states and 191422 transitions. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:58,650 INFO L93 Difference]: Finished difference Result 355229 states and 382086 transitions. [2022-07-19 12:13:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 772 [2022-07-19 12:13:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:58,920 INFO L225 Difference]: With dead ends: 355229 [2022-07-19 12:13:58,920 INFO L226 Difference]: Without dead ends: 177991 [2022-07-19 12:13:58,993 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 [2022-07-19 12:13:58,994 INFO L413 NwaCegarLoop]: 1254 mSDtfsCounter, 405 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:58,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1262 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:13:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177991 states. [2022-07-19 12:14:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177991 to 173485. [2022-07-19 12:14:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173485 states, 173484 states have (on average 1.0592965345507366) internal successors, (183771), 173484 states have internal predecessors, (183771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173485 states to 173485 states and 183771 transitions. [2022-07-19 12:14:01,582 INFO L78 Accepts]: Start accepts. Automaton has 173485 states and 183771 transitions. Word has length 772 [2022-07-19 12:14:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:01,583 INFO L495 AbstractCegarLoop]: Abstraction has 173485 states and 183771 transitions. [2022-07-19 12:14:01,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 173485 states and 183771 transitions. [2022-07-19 12:14:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2022-07-19 12:14:01,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:01,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:01,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:14:01,636 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash 154466670, now seen corresponding path program 1 times [2022-07-19 12:14:01,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:01,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693070420] [2022-07-19 12:14:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-19 12:14:02,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:02,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693070420] [2022-07-19 12:14:02,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693070420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:02,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:02,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:14:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983004416] [2022-07-19 12:14:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:14:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:14:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:14:02,503 INFO L87 Difference]: Start difference. First operand 173485 states and 183771 transitions. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:06,588 INFO L93 Difference]: Finished difference Result 419815 states and 446122 transitions. [2022-07-19 12:14:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:14:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 804 [2022-07-19 12:14:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:06,985 INFO L225 Difference]: With dead ends: 419815 [2022-07-19 12:14:06,986 INFO L226 Difference]: Without dead ends: 247083 [2022-07-19 12:14:07,073 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 [2022-07-19 12:14:07,073 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 747 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:07,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 597 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:14:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247083 states. [2022-07-19 12:14:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247083 to 232814. [2022-07-19 12:14:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232814 states, 232813 states have (on average 1.0520460627198653) internal successors, (244930), 232813 states have internal predecessors, (244930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232814 states to 232814 states and 244930 transitions. [2022-07-19 12:14:11,029 INFO L78 Accepts]: Start accepts. Automaton has 232814 states and 244930 transitions. Word has length 804 [2022-07-19 12:14:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:11,029 INFO L495 AbstractCegarLoop]: Abstraction has 232814 states and 244930 transitions. [2022-07-19 12:14:11,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:11,030 INFO L276 IsEmpty]: Start isEmpty. Operand 232814 states and 244930 transitions. [2022-07-19 12:14:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2022-07-19 12:14:11,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:11,094 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 12:14:11,094 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1772033187, now seen corresponding path program 1 times [2022-07-19 12:14:11,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:11,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460712073] [2022-07-19 12:14:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:11,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2022-07-19 12:14:11,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:11,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460712073] [2022-07-19 12:14:11,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460712073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:11,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:11,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:14:11,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47237329] [2022-07-19 12:14:11,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:11,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:14:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:11,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:14:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:14:11,858 INFO L87 Difference]: Start difference. First operand 232814 states and 244930 transitions. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:16,050 INFO L93 Difference]: Finished difference Result 484401 states and 510727 transitions. [2022-07-19 12:14:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:14:16,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 895 [2022-07-19 12:14:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:16,568 INFO L225 Difference]: With dead ends: 484401 [2022-07-19 12:14:16,569 INFO L226 Difference]: Without dead ends: 290641 [2022-07-19 12:14:16,733 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 [2022-07-19 12:14:16,733 INFO L413 NwaCegarLoop]: 1384 mSDtfsCounter, 832 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2518 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:16,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 1392 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2518 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:14:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290641 states.