./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem13_label27.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 e8feab662bc73c18f88b757dfbe2687c764aa0043a35ed648ed6332a38c0448d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:06:46,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:06:46,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:06:46,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:06:46,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:06:46,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:06:46,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:06:46,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:06:46,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:06:46,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:06:46,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:06:46,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:06:46,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:06:46,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:06:46,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:06:46,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:06:46,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:06:46,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:06:46,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:06:46,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:06:46,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:06:46,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:06:46,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:06:46,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:06:46,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:06:46,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:06:46,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:06:46,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:06:46,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:06:46,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:06:46,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:06:46,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:06:46,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:06:46,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:06:46,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:06:46,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:06:46,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:06:46,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:06:46,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:06:46,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:06:46,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:06:46,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:06:46,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:06:46,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:06:46,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:06:46,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:06:46,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:06:46,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:06:46,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:06:46,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:06:46,330 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:06:46,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:06:46,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:06:46,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:06:46,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:06:46,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:06:46,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:06:46,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:06:46,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:06:46,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:06:46,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:06:46,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:06:46,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:06:46,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:06:46,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:06:46,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:06:46,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:06:46,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:06:46,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:06:46,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:06:46,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:06:46,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:06:46,336 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:06:46,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:06:46,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:06:46,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:06:46,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8feab662bc73c18f88b757dfbe2687c764aa0043a35ed648ed6332a38c0448d [2021-12-21 11:06:46,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:06:46,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:06:46,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:06:46,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:06:46,548 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:06:46,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2021-12-21 11:06:46,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3c3008c/bd0a18bdde024bd0b80ca9cb21d20723/FLAG95b37a1e5 [2021-12-21 11:06:47,202 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:06:47,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2021-12-21 11:06:47,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3c3008c/bd0a18bdde024bd0b80ca9cb21d20723/FLAG95b37a1e5 [2021-12-21 11:06:47,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3c3008c/bd0a18bdde024bd0b80ca9cb21d20723 [2021-12-21 11:06:47,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:06:47,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:06:47,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:06:47,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:06:47,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:06:47,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:06:47" (1/1) ... [2021-12-21 11:06:47,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667a6f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:47, skipping insertion in model container [2021-12-21 11:06:47,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:06:47" (1/1) ... [2021-12-21 11:06:47,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:06:47,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:06:47,729 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/Problem13_label27.c[6468,6481] [2021-12-21 11:06:48,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:06:48,415 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:06:48,429 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/Problem13_label27.c[6468,6481] [2021-12-21 11:06:48,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:06:48,861 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:06:48,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48 WrapperNode [2021-12-21 11:06:48,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:06:48,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:06:48,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:06:48,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:06:48,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:48,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:49,450 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-21 11:06:49,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:06:49,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:06:49,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:06:49,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:06:49,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:49,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:49,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:49,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:49,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:49,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:49,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:50,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:06:50,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:06:50,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:06:50,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:06:50,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (1/1) ... [2021-12-21 11:06:50,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:06:50,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:06:50,101 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) [2021-12-21 11:06:50,171 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 [2021-12-21 11:06:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:06:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:06:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:06:50,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:06:50,309 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:06:50,322 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:06:53,566 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:06:53,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:06:53,584 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:06:53,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:06:53 BoogieIcfgContainer [2021-12-21 11:06:53,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:06:53,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:06:53,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:06:53,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:06:53,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:06:47" (1/3) ... [2021-12-21 11:06:53,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdc916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:06:53, skipping insertion in model container [2021-12-21 11:06:53,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:06:48" (2/3) ... [2021-12-21 11:06:53,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdc916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:06:53, skipping insertion in model container [2021-12-21 11:06:53,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:06:53" (3/3) ... [2021-12-21 11:06:53,594 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2021-12-21 11:06:53,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:06:53,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:06:53,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:06:53,646 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:06:53,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:06:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:06:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 11:06:53,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:06:53,682 INFO L514 BasicCegarLoop]: 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, 1, 1] [2021-12-21 11:06:53,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:06:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:06:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-12-21 11:06:53,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:06:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48422808] [2021-12-21 11:06:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:06:53,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:06:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:06:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:06:53,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:06:53,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48422808] [2021-12-21 11:06:53,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48422808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:06:53,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:06:53,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:06:53,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234659206] [2021-12-21 11:06:53,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:06:53,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:06:53,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:06:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:06:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:06:53,912 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:06:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:06:58,043 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-21 11:06:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:06:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-21 11:06:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:06:58,068 INFO L225 Difference]: With dead ends: 3160 [2021-12-21 11:06:58,068 INFO L226 Difference]: Without dead ends: 1983 [2021-12-21 11:06:58,076 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:06:58,080 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1058 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:06:58,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-21 11:06:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-21 11:06:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-21 11:06:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:06:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-21 11:06:58,183 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 45 [2021-12-21 11:06:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:06:58,183 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-21 11:06:58,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:06:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-21 11:06:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 11:06:58,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:06:58,187 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-21 11:06:58,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:06:58,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:06:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:06:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 331802818, now seen corresponding path program 1 times [2021-12-21 11:06:58,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:06:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775032496] [2021-12-21 11:06:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:06:58,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:06:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:06:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:06:58,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:06:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775032496] [2021-12-21 11:06:58,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775032496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:06:58,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:06:58,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:06:58,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224654234] [2021-12-21 11:06:58,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:06:58,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:06:58,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:06:58,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:06:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:06:58,304 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:01,125 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2021-12-21 11:07:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-21 11:07:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:01,134 INFO L225 Difference]: With dead ends: 5456 [2021-12-21 11:07:01,135 INFO L226 Difference]: Without dead ends: 3528 [2021-12-21 11:07:01,137 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:01,137 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:01,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:07:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-12-21 11:07:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-12-21 11:07:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2021-12-21 11:07:01,196 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 110 [2021-12-21 11:07:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:01,196 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2021-12-21 11:07:01,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2021-12-21 11:07:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-21 11:07:01,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:01,199 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-21 11:07:01,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:07:01,200 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -748334831, now seen corresponding path program 1 times [2021-12-21 11:07:01,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:01,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805492479] [2021-12-21 11:07:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:01,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:07:01,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:01,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805492479] [2021-12-21 11:07:01,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805492479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:01,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:01,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:07:01,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716143204] [2021-12-21 11:07:01,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:01,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:01,280 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:03,888 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2021-12-21 11:07:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:03,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-21 11:07:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:03,906 INFO L225 Difference]: With dead ends: 10232 [2021-12-21 11:07:03,907 INFO L226 Difference]: Without dead ends: 6708 [2021-12-21 11:07:03,912 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:03,918 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:03,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:07:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2021-12-21 11:07:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2021-12-21 11:07:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2021-12-21 11:07:04,011 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 116 [2021-12-21 11:07:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:04,013 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2021-12-21 11:07:04,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2021-12-21 11:07:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-21 11:07:04,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:04,020 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-21 11:07:04,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:07:04,021 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:04,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1036466844, now seen corresponding path program 1 times [2021-12-21 11:07:04,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:04,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883149281] [2021-12-21 11:07:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:04,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:07:04,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:04,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883149281] [2021-12-21 11:07:04,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883149281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:04,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:04,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:07:04,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708480426] [2021-12-21 11:07:04,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:04,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:04,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:04,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:04,120 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:07,336 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2021-12-21 11:07:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-12-21 11:07:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:07,362 INFO L225 Difference]: With dead ends: 17443 [2021-12-21 11:07:07,362 INFO L226 Difference]: Without dead ends: 10745 [2021-12-21 11:07:07,369 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:07,369 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:07,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 11:07:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-12-21 11:07:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2021-12-21 11:07:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2021-12-21 11:07:07,502 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 146 [2021-12-21 11:07:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:07,503 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2021-12-21 11:07:07,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2021-12-21 11:07:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 11:07:07,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:07,506 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-21 11:07:07,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:07:07,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1555116277, now seen corresponding path program 1 times [2021-12-21 11:07:07,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:07,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142130964] [2021-12-21 11:07:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:07,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:07:07,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142130964] [2021-12-21 11:07:07,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142130964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:07,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:07,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:07:07,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636686492] [2021-12-21 11:07:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:07,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:07,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:07,638 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:10,119 INFO L93 Difference]: Finished difference Result 20549 states and 28119 transitions. [2021-12-21 11:07:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:10,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-12-21 11:07:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:10,140 INFO L225 Difference]: With dead ends: 20549 [2021-12-21 11:07:10,140 INFO L226 Difference]: Without dead ends: 10669 [2021-12-21 11:07:10,149 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:10,150 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:10,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:07:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2021-12-21 11:07:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10669. [2021-12-21 11:07:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3539557555305586) internal successors, (14444), 10668 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14444 transitions. [2021-12-21 11:07:10,270 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14444 transitions. Word has length 156 [2021-12-21 11:07:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:10,270 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14444 transitions. [2021-12-21 11:07:10,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14444 transitions. [2021-12-21 11:07:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-21 11:07:10,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:10,272 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-21 11:07:10,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:07:10,273 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:10,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1267295969, now seen corresponding path program 1 times [2021-12-21 11:07:10,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:10,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643404474] [2021-12-21 11:07:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:10,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:07:10,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:10,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643404474] [2021-12-21 11:07:10,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643404474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:10,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:10,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:07:10,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845205563] [2021-12-21 11:07:10,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:10,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:10,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:10,345 INFO L87 Difference]: Start difference. First operand 10669 states and 14444 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:13,279 INFO L93 Difference]: Finished difference Result 29991 states and 41155 transitions. [2021-12-21 11:07:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:13,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2021-12-21 11:07:13,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:13,308 INFO L225 Difference]: With dead ends: 29991 [2021-12-21 11:07:13,308 INFO L226 Difference]: Without dead ends: 20111 [2021-12-21 11:07:13,320 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:13,321 INFO L933 BasicCegarLoop]: 1849 mSDtfsCounter, 892 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:13,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 1988 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:07:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20111 states. [2021-12-21 11:07:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20111 to 19314. [2021-12-21 11:07:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19314 states, 19313 states have (on average 1.2808470978097655) internal successors, (24737), 19313 states have internal predecessors, (24737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19314 states to 19314 states and 24737 transitions. [2021-12-21 11:07:13,511 INFO L78 Accepts]: Start accepts. Automaton has 19314 states and 24737 transitions. Word has length 170 [2021-12-21 11:07:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:13,511 INFO L470 AbstractCegarLoop]: Abstraction has 19314 states and 24737 transitions. [2021-12-21 11:07:13,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19314 states and 24737 transitions. [2021-12-21 11:07:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-21 11:07:13,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:13,514 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:07:13,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:07:13,514 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:13,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1650019074, now seen corresponding path program 1 times [2021-12-21 11:07:13,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:13,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695669431] [2021-12-21 11:07:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:13,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-21 11:07:13,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:13,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695669431] [2021-12-21 11:07:13,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695669431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:13,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:13,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:07:13,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131544268] [2021-12-21 11:07:13,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:13,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:13,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:13,622 INFO L87 Difference]: Start difference. First operand 19314 states and 24737 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:16,374 INFO L93 Difference]: Finished difference Result 44942 states and 56955 transitions. [2021-12-21 11:07:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 257 [2021-12-21 11:07:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:16,414 INFO L225 Difference]: With dead ends: 44942 [2021-12-21 11:07:16,414 INFO L226 Difference]: Without dead ends: 25630 [2021-12-21 11:07:16,432 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:16,434 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 726 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:16,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 1191 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:07:16,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25630 states. [2021-12-21 11:07:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25630 to 25622. [2021-12-21 11:07:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 1.2324655555989228) internal successors, (31577), 25621 states have internal predecessors, (31577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 31577 transitions. [2021-12-21 11:07:16,718 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 31577 transitions. Word has length 257 [2021-12-21 11:07:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:16,719 INFO L470 AbstractCegarLoop]: Abstraction has 25622 states and 31577 transitions. [2021-12-21 11:07:16,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 31577 transitions. [2021-12-21 11:07:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-21 11:07:16,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:16,723 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:07:16,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:07:16,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1608424042, now seen corresponding path program 1 times [2021-12-21 11:07:16,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:16,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336214369] [2021-12-21 11:07:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:16,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:07:16,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336214369] [2021-12-21 11:07:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336214369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:16,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:16,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:07:16,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440387833] [2021-12-21 11:07:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:16,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:16,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:16,838 INFO L87 Difference]: Start difference. First operand 25622 states and 31577 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:19,796 INFO L93 Difference]: Finished difference Result 72509 states and 89961 transitions. [2021-12-21 11:07:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 272 [2021-12-21 11:07:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:19,848 INFO L225 Difference]: With dead ends: 72509 [2021-12-21 11:07:19,849 INFO L226 Difference]: Without dead ends: 47676 [2021-12-21 11:07:19,873 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:19,873 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 825 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:19,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 900 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:07:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47676 states. [2021-12-21 11:07:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47676 to 46091. [2021-12-21 11:07:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46091 states, 46090 states have (on average 1.1848557170752876) internal successors, (54610), 46090 states have internal predecessors, (54610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46091 states to 46091 states and 54610 transitions. [2021-12-21 11:07:20,374 INFO L78 Accepts]: Start accepts. Automaton has 46091 states and 54610 transitions. Word has length 272 [2021-12-21 11:07:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:20,376 INFO L470 AbstractCegarLoop]: Abstraction has 46091 states and 54610 transitions. [2021-12-21 11:07:20,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 46091 states and 54610 transitions. [2021-12-21 11:07:20,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-21 11:07:20,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:20,386 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-21 11:07:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:07:20,387 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1505061361, now seen corresponding path program 1 times [2021-12-21 11:07:20,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:20,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151442963] [2021-12-21 11:07:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:20,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 214 proven. 113 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 11:07:20,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:20,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151442963] [2021-12-21 11:07:20,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151442963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:07:20,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609097028] [2021-12-21 11:07:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:20,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:07:20,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:07:20,656 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) [2021-12-21 11:07:20,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:07:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:07:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:07:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-21 11:07:21,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:07:21,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609097028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:21,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:07:21,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:07:21,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155702497] [2021-12-21 11:07:21,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:21,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:21,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:07:21,228 INFO L87 Difference]: Start difference. First operand 46091 states and 54610 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:23,866 INFO L93 Difference]: Finished difference Result 91382 states and 108416 transitions. [2021-12-21 11:07:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351 [2021-12-21 11:07:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:23,915 INFO L225 Difference]: With dead ends: 91382 [2021-12-21 11:07:23,916 INFO L226 Difference]: Without dead ends: 46080 [2021-12-21 11:07:23,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:07:23,945 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 1077 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:23,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 822 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:07:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46080 states. [2021-12-21 11:07:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46080 to 46077. [2021-12-21 11:07:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46077 states, 46076 states have (on average 1.1360578175188818) internal successors, (52345), 46076 states have internal predecessors, (52345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46077 states to 46077 states and 52345 transitions. [2021-12-21 11:07:24,517 INFO L78 Accepts]: Start accepts. Automaton has 46077 states and 52345 transitions. Word has length 351 [2021-12-21 11:07:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:24,517 INFO L470 AbstractCegarLoop]: Abstraction has 46077 states and 52345 transitions. [2021-12-21 11:07:24,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 46077 states and 52345 transitions. [2021-12-21 11:07:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-12-21 11:07:24,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:24,523 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:07:24,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 11:07:24,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:07:24,741 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash -625904064, now seen corresponding path program 1 times [2021-12-21 11:07:24,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704978127] [2021-12-21 11:07:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:24,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-21 11:07:24,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704978127] [2021-12-21 11:07:24,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704978127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:24,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:24,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:07:24,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531901264] [2021-12-21 11:07:24,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:24,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:24,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:24,843 INFO L87 Difference]: Start difference. First operand 46077 states and 52345 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:27,659 INFO L93 Difference]: Finished difference Result 101586 states and 116820 transitions. [2021-12-21 11:07:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 [2021-12-21 11:07:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:27,728 INFO L225 Difference]: With dead ends: 101586 [2021-12-21 11:07:27,729 INFO L226 Difference]: Without dead ends: 56298 [2021-12-21 11:07:27,756 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:27,757 INFO L933 BasicCegarLoop]: 1440 mSDtfsCounter, 1110 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:27,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 1525 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:07:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56298 states. [2021-12-21 11:07:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56298 to 56297. [2021-12-21 11:07:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56297 states, 56296 states have (on average 1.1241651271848798) internal successors, (63286), 56296 states have internal predecessors, (63286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56297 states to 56297 states and 63286 transitions. [2021-12-21 11:07:28,408 INFO L78 Accepts]: Start accepts. Automaton has 56297 states and 63286 transitions. Word has length 360 [2021-12-21 11:07:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:28,408 INFO L470 AbstractCegarLoop]: Abstraction has 56297 states and 63286 transitions. [2021-12-21 11:07:28,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 56297 states and 63286 transitions. [2021-12-21 11:07:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-12-21 11:07:28,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:28,416 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:07:28,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:07:28,416 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash 271548370, now seen corresponding path program 1 times [2021-12-21 11:07:28,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:28,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052336231] [2021-12-21 11:07:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:28,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-21 11:07:28,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:28,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052336231] [2021-12-21 11:07:28,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052336231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:28,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:28,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:07:28,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642059568] [2021-12-21 11:07:28,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:28,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:07:28,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:07:28,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:07:28,526 INFO L87 Difference]: Start difference. First operand 56297 states and 63286 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:34,185 INFO L93 Difference]: Finished difference Result 141882 states and 159543 transitions. [2021-12-21 11:07:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:07:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 393 [2021-12-21 11:07:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:34,274 INFO L225 Difference]: With dead ends: 141882 [2021-12-21 11:07:34,275 INFO L226 Difference]: Without dead ends: 86374 [2021-12-21 11:07:34,300 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:34,306 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 1688 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 5942 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 6928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 5942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:34,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1688 Valid, 864 Invalid, 6928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 5942 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-21 11:07:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86374 states. [2021-12-21 11:07:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86374 to 68114. [2021-12-21 11:07:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68114 states, 68113 states have (on average 1.1126069913232424) internal successors, (75783), 68113 states have internal predecessors, (75783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68114 states to 68114 states and 75783 transitions. [2021-12-21 11:07:35,131 INFO L78 Accepts]: Start accepts. Automaton has 68114 states and 75783 transitions. Word has length 393 [2021-12-21 11:07:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:35,132 INFO L470 AbstractCegarLoop]: Abstraction has 68114 states and 75783 transitions. [2021-12-21 11:07:35,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 68114 states and 75783 transitions. [2021-12-21 11:07:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-21 11:07:35,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:35,163 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-21 11:07:35,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:07:35,164 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1710275287, now seen corresponding path program 1 times [2021-12-21 11:07:35,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:35,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926067041] [2021-12-21 11:07:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:35,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-21 11:07:35,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:35,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926067041] [2021-12-21 11:07:35,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926067041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:35,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:35,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:07:35,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098267406] [2021-12-21 11:07:35,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:35,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:35,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:35,390 INFO L87 Difference]: Start difference. First operand 68114 states and 75783 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:38,984 INFO L93 Difference]: Finished difference Result 159833 states and 178094 transitions. [2021-12-21 11:07:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 406 [2021-12-21 11:07:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:39,089 INFO L225 Difference]: With dead ends: 159833 [2021-12-21 11:07:39,090 INFO L226 Difference]: Without dead ends: 92508 [2021-12-21 11:07:39,125 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:39,126 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 831 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:39,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 783 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 11:07:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92508 states. [2021-12-21 11:07:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92508 to 90920. [2021-12-21 11:07:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90920 states, 90919 states have (on average 1.0987142401478238) internal successors, (99894), 90919 states have internal predecessors, (99894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90920 states to 90920 states and 99894 transitions. [2021-12-21 11:07:40,107 INFO L78 Accepts]: Start accepts. Automaton has 90920 states and 99894 transitions. Word has length 406 [2021-12-21 11:07:40,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:40,108 INFO L470 AbstractCegarLoop]: Abstraction has 90920 states and 99894 transitions. [2021-12-21 11:07:40,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 90920 states and 99894 transitions. [2021-12-21 11:07:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-21 11:07:40,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:40,125 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:07:40,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:07:40,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash -408391344, now seen corresponding path program 1 times [2021-12-21 11:07:40,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:40,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123139856] [2021-12-21 11:07:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:40,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 365 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-21 11:07:40,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:40,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123139856] [2021-12-21 11:07:40,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123139856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:40,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:40,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:07:40,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106812484] [2021-12-21 11:07:40,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:40,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:40,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:40,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:40,309 INFO L87 Difference]: Start difference. First operand 90920 states and 99894 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:43,007 INFO L93 Difference]: Finished difference Result 204687 states and 224264 transitions. [2021-12-21 11:07:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:43,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 426 [2021-12-21 11:07:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:43,128 INFO L225 Difference]: With dead ends: 204687 [2021-12-21 11:07:43,128 INFO L226 Difference]: Without dead ends: 114556 [2021-12-21 11:07:43,178 INFO L932 BasicCegarLoop]: 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 [2021-12-21 11:07:43,178 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 796 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:43,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 1116 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:07:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114556 states. [2021-12-21 11:07:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114556 to 110599. [2021-12-21 11:07:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110599 states, 110598 states have (on average 1.088509737969945) internal successors, (120387), 110598 states have internal predecessors, (120387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110599 states to 110599 states and 120387 transitions. [2021-12-21 11:07:44,451 INFO L78 Accepts]: Start accepts. Automaton has 110599 states and 120387 transitions. Word has length 426 [2021-12-21 11:07:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:44,452 INFO L470 AbstractCegarLoop]: Abstraction has 110599 states and 120387 transitions. [2021-12-21 11:07:44,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 110599 states and 120387 transitions. [2021-12-21 11:07:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-21 11:07:44,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:44,458 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-21 11:07:44,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:07:44,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:44,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1634378536, now seen corresponding path program 1 times [2021-12-21 11:07:44,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:44,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499544948] [2021-12-21 11:07:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:44,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 383 proven. 113 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-21 11:07:44,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499544948] [2021-12-21 11:07:44,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499544948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:07:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936276484] [2021-12-21 11:07:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:44,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:07:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:07:44,691 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) [2021-12-21 11:07:44,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:07:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:44,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:07:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:07:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-21 11:07:45,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:07:45,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936276484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:45,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:07:45,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 11:07:45,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070387830] [2021-12-21 11:07:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:45,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:45,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:07:45,937 INFO L87 Difference]: Start difference. First operand 110599 states and 120387 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:07:48,654 INFO L93 Difference]: Finished difference Result 210184 states and 229315 transitions. [2021-12-21 11:07:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:07:48,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 436 [2021-12-21 11:07:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:07:48,789 INFO L225 Difference]: With dead ends: 210184 [2021-12-21 11:07:48,790 INFO L226 Difference]: Without dead ends: 113757 [2021-12-21 11:07:48,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:07:48,829 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 682 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:07:48,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1150 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:07:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113757 states. [2021-12-21 11:07:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113757 to 113747. [2021-12-21 11:07:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113747 states, 113746 states have (on average 1.0789302480966363) internal successors, (122724), 113746 states have internal predecessors, (122724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113747 states to 113747 states and 122724 transitions. [2021-12-21 11:07:50,115 INFO L78 Accepts]: Start accepts. Automaton has 113747 states and 122724 transitions. Word has length 436 [2021-12-21 11:07:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:07:50,115 INFO L470 AbstractCegarLoop]: Abstraction has 113747 states and 122724 transitions. [2021-12-21 11:07:50,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:07:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 113747 states and 122724 transitions. [2021-12-21 11:07:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-12-21 11:07:50,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:07:50,127 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:07:50,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:07:50,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 11:07:50,344 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:07:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:07:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1472115083, now seen corresponding path program 1 times [2021-12-21 11:07:50,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:07:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920176733] [2021-12-21 11:07:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:07:50,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:07:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:07:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-21 11:07:50,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:07:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920176733] [2021-12-21 11:07:50,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920176733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:07:50,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:07:50,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:07:50,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195968584] [2021-12-21 11:07:50,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:07:50,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:07:50,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:07:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:07:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:07:50,704 INFO L87 Difference]: Start difference. First operand 113747 states and 122724 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)