./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label33.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/Problem16_label33.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 699c9c8063acd4bd53cef44ad5ead9f63bc9d124723ec1a4a717150e95ac10f2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:18:14,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:18:14,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:18:14,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:18:14,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:18:14,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:18:14,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:18:14,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:18:14,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:18:14,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:18:14,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:18:14,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:18:14,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:18:14,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:18:14,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:18:14,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:18:14,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:18:14,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:18:14,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:18:14,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:18:14,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:18:14,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:18:14,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:18:14,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:18:14,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:18:14,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:18:14,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:18:14,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:18:14,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:18:14,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:18:14,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:18:14,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:18:14,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:18:14,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:18:14,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:18:14,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:18:14,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:18:14,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:18:14,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:18:14,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:18:14,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:18:14,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:18:14,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:18:14,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:18:14,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:18:14,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:18:14,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:18:14,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:18:14,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:18:14,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:18:14,309 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:18:14,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:18:14,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:18:14,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:18:14,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:18:14,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:18:14,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:18:14,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:18:14,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:18:14,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:18:14,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:18:14,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:18:14,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:18:14,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:18:14,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:18:14,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:18:14,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:18:14,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:18:14,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:18:14,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:18:14,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:18:14,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:18:14,313 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:18:14,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:18:14,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:18:14,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:18:14,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 699c9c8063acd4bd53cef44ad5ead9f63bc9d124723ec1a4a717150e95ac10f2 [2021-12-21 11:18:14,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:18:14,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:18:14,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:18:14,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:18:14,543 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:18:14,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label33.c [2021-12-21 11:18:14,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b781a5bd/f848da63ab734abea8a567a19c701fce/FLAG02c2cedad [2021-12-21 11:18:15,041 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:18:15,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label33.c [2021-12-21 11:18:15,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b781a5bd/f848da63ab734abea8a567a19c701fce/FLAG02c2cedad [2021-12-21 11:18:15,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b781a5bd/f848da63ab734abea8a567a19c701fce [2021-12-21 11:18:15,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:18:15,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:18:15,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:18:15,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:18:15,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:18:15,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:18:15" (1/1) ... [2021-12-21 11:18:15,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22cc6a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:15, skipping insertion in model container [2021-12-21 11:18:15,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:18:15" (1/1) ... [2021-12-21 11:18:15,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:18:15,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:18:15,613 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/Problem16_label33.c[3017,3030] [2021-12-21 11:18:15,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:18:15,925 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:18:15,938 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/Problem16_label33.c[3017,3030] [2021-12-21 11:18:16,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:18:16,089 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:18:16,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16 WrapperNode [2021-12-21 11:18:16,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:18:16,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:18:16,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:18:16,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:18:16,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,200 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-21 11:18:16,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:18:16,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:18:16,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:18:16,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:18:16,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:18:16,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:18:16,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:18:16,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:18:16,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (1/1) ... [2021-12-21 11:18:16,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:18:16,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:16,369 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 11:18:16,386 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 11:18:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:18:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:18:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:18:16,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:18:16,438 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:18:16,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:18:17,617 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:18:17,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:18:17,625 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:18:17,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:18:17 BoogieIcfgContainer [2021-12-21 11:18:17,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:18:17,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:18:17,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:18:17,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:18:17,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:18:15" (1/3) ... [2021-12-21 11:18:17,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:18:17, skipping insertion in model container [2021-12-21 11:18:17,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:18:16" (2/3) ... [2021-12-21 11:18:17,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:18:17, skipping insertion in model container [2021-12-21 11:18:17,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:18:17" (3/3) ... [2021-12-21 11:18:17,632 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label33.c [2021-12-21 11:18:17,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:18:17,635 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:18:17,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:18:17,668 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 11:18:17,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:18:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 11:18:17,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 11:18:17,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:17,686 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] [2021-12-21 11:18:17,686 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2021-12-21 11:18:17,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:17,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241070681] [2021-12-21 11:18:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:17,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:17,846 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 11:18:17,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:17,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241070681] [2021-12-21 11:18:17,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241070681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:17,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:17,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:17,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827811818] [2021-12-21 11:18:17,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:17,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:18:17,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:17,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:18:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:18:17,882 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 11:18:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:19,736 INFO L93 Difference]: Finished difference Result 1456 states and 2764 transitions. [2021-12-21 11:18:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:18:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 11:18:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:19,766 INFO L225 Difference]: With dead ends: 1456 [2021-12-21 11:18:19,766 INFO L226 Difference]: Without dead ends: 991 [2021-12-21 11:18:19,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:18:19,772 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1095 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:19,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 96 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:18:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-12-21 11:18:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2021-12-21 11:18:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.497979797979798) internal successors, (1483), 990 states have internal predecessors, (1483), 0 states have call successors, (0), 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 11:18:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1483 transitions. [2021-12-21 11:18:19,872 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1483 transitions. Word has length 27 [2021-12-21 11:18:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:19,873 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1483 transitions. [2021-12-21 11:18:19,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 11:18:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1483 transitions. [2021-12-21 11:18:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-21 11:18:19,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:19,882 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:18:19,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:18:19,896 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1421584585, now seen corresponding path program 1 times [2021-12-21 11:18:19,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:19,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650471440] [2021-12-21 11:18:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:19,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:18:20,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:20,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650471440] [2021-12-21 11:18:20,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650471440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:20,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:20,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:20,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128585651] [2021-12-21 11:18:20,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:20,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:20,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:20,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:20,249 INFO L87 Difference]: Start difference. First operand 991 states and 1483 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 11:18:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:21,246 INFO L93 Difference]: Finished difference Result 1980 states and 3168 transitions. [2021-12-21 11:18:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2021-12-21 11:18:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:21,251 INFO L225 Difference]: With dead ends: 1980 [2021-12-21 11:18:21,251 INFO L226 Difference]: Without dead ends: 1320 [2021-12-21 11:18:21,255 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 11:18:21,257 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 279 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:21,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 539 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:18:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-21 11:18:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-21 11:18:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.423805913570887) internal successors, (1878), 1319 states have internal predecessors, (1878), 0 states have call successors, (0), 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 11:18:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1878 transitions. [2021-12-21 11:18:21,281 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1878 transitions. Word has length 217 [2021-12-21 11:18:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:21,284 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1878 transitions. [2021-12-21 11:18:21,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 11:18:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1878 transitions. [2021-12-21 11:18:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-21 11:18:21,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:21,296 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:18:21,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:18:21,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:21,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1801200137, now seen corresponding path program 1 times [2021-12-21 11:18:21,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:21,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154703182] [2021-12-21 11:18:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:21,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 11:18:21,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:21,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154703182] [2021-12-21 11:18:21,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154703182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:21,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:21,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:18:21,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51330923] [2021-12-21 11:18:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:21,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:21,378 INFO L87 Difference]: Start difference. First operand 1320 states and 1878 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:22,460 INFO L93 Difference]: Finished difference Result 3296 states and 4947 transitions. [2021-12-21 11:18:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:22,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-12-21 11:18:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:22,466 INFO L225 Difference]: With dead ends: 3296 [2021-12-21 11:18:22,466 INFO L226 Difference]: Without dead ends: 1978 [2021-12-21 11:18:22,467 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 11:18:22,472 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 339 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:22,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 156 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:18:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-21 11:18:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-21 11:18:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.1335356600910471) internal successors, (2241), 1977 states have internal predecessors, (2241), 0 states have call successors, (0), 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 11:18:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2241 transitions. [2021-12-21 11:18:22,501 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2241 transitions. Word has length 220 [2021-12-21 11:18:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:22,502 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2241 transitions. [2021-12-21 11:18:22,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2241 transitions. [2021-12-21 11:18:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-21 11:18:22,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:22,505 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:22,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:18:22,506 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1468102873, now seen corresponding path program 1 times [2021-12-21 11:18:22,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:22,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489724317] [2021-12-21 11:18:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:22,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-21 11:18:22,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489724317] [2021-12-21 11:18:22,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489724317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:22,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:22,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:18:22,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164266338] [2021-12-21 11:18:22,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:22,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:22,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:22,657 INFO L87 Difference]: Start difference. First operand 1978 states and 2241 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 11:18:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:23,494 INFO L93 Difference]: Finished difference Result 3954 states and 4508 transitions. [2021-12-21 11:18:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 346 [2021-12-21 11:18:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:23,500 INFO L225 Difference]: With dead ends: 3954 [2021-12-21 11:18:23,500 INFO L226 Difference]: Without dead ends: 2307 [2021-12-21 11:18:23,502 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 11:18:23,502 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 262 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:23,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 31 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:18:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-12-21 11:18:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2021-12-21 11:18:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.092801387684302) internal successors, (2520), 2306 states have internal predecessors, (2520), 0 states have call successors, (0), 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 11:18:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2520 transitions. [2021-12-21 11:18:23,527 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2520 transitions. Word has length 346 [2021-12-21 11:18:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:23,527 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2520 transitions. [2021-12-21 11:18:23,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 11:18:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2520 transitions. [2021-12-21 11:18:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2021-12-21 11:18:23,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:23,534 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:18:23,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:18:23,534 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:23,535 INFO L85 PathProgramCache]: Analyzing trace with hash -632973434, now seen corresponding path program 1 times [2021-12-21 11:18:23,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:23,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490910626] [2021-12-21 11:18:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:23,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 11:18:23,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490910626] [2021-12-21 11:18:23,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490910626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:23,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:23,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:23,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506935105] [2021-12-21 11:18:23,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:23,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:23,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:23,693 INFO L87 Difference]: Start difference. First operand 2307 states and 2520 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 11:18:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:24,565 INFO L93 Difference]: Finished difference Result 5928 states and 6509 transitions. [2021-12-21 11:18:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 604 [2021-12-21 11:18:24,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:24,576 INFO L225 Difference]: With dead ends: 5928 [2021-12-21 11:18:24,576 INFO L226 Difference]: Without dead ends: 3952 [2021-12-21 11:18:24,579 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 11:18:24,580 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:24,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 428 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:18:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-21 11:18:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3623. [2021-12-21 11:18:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 1.0668139149641083) internal successors, (3864), 3622 states have internal predecessors, (3864), 0 states have call successors, (0), 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 11:18:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 3864 transitions. [2021-12-21 11:18:24,677 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 3864 transitions. Word has length 604 [2021-12-21 11:18:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:24,679 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 3864 transitions. [2021-12-21 11:18:24,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 11:18:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 3864 transitions. [2021-12-21 11:18:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-12-21 11:18:24,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:24,693 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-21 11:18:24,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:18:24,694 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash -272769792, now seen corresponding path program 1 times [2021-12-21 11:18:24,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:24,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353545544] [2021-12-21 11:18:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:24,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 697 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-21 11:18:24,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:24,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353545544] [2021-12-21 11:18:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353545544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:24,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:24,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:24,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048898033] [2021-12-21 11:18:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:24,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:24,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:24,878 INFO L87 Difference]: Start difference. First operand 3623 states and 3864 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 11:18:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:25,568 INFO L93 Difference]: Finished difference Result 8560 states and 9237 transitions. [2021-12-21 11:18:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 667 [2021-12-21 11:18:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:25,581 INFO L225 Difference]: With dead ends: 8560 [2021-12-21 11:18:25,581 INFO L226 Difference]: Without dead ends: 5268 [2021-12-21 11:18:25,584 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 11:18:25,584 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 171 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:25,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 432 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:18:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-21 11:18:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2021-12-21 11:18:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.0569584203531421) internal successors, (5567), 5267 states have internal predecessors, (5567), 0 states have call successors, (0), 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 11:18:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 5567 transitions. [2021-12-21 11:18:25,642 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 5567 transitions. Word has length 667 [2021-12-21 11:18:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:25,643 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 5567 transitions. [2021-12-21 11:18:25,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 11:18:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 5567 transitions. [2021-12-21 11:18:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-12-21 11:18:25,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:25,653 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:18:25,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:18:25,654 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1124600290, now seen corresponding path program 1 times [2021-12-21 11:18:25,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:25,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671281245] [2021-12-21 11:18:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:25,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 262 proven. 443 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-21 11:18:25,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:25,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671281245] [2021-12-21 11:18:25,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671281245] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:25,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030143874] [2021-12-21 11:18:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:25,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:25,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:25,943 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 11:18:25,946 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 11:18:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:18:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:18:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-12-21 11:18:27,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:18:27,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030143874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:27,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:18:27,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:18:27,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486885976] [2021-12-21 11:18:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:27,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:27,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:18:27,123 INFO L87 Difference]: Start difference. First operand 5268 states and 5567 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 11:18:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:27,785 INFO L93 Difference]: Finished difference Result 10205 states and 10801 transitions. [2021-12-21 11:18:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 692 [2021-12-21 11:18:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:27,797 INFO L225 Difference]: With dead ends: 10205 [2021-12-21 11:18:27,798 INFO L226 Difference]: Without dead ends: 5268 [2021-12-21 11:18:27,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:18:27,802 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 258 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:27,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 377 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:18:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-21 11:18:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2021-12-21 11:18:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.0487943801025252) internal successors, (5524), 5267 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 11:18:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 5524 transitions. [2021-12-21 11:18:27,856 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 5524 transitions. Word has length 692 [2021-12-21 11:18:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:27,857 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 5524 transitions. [2021-12-21 11:18:27,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 11:18:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 5524 transitions. [2021-12-21 11:18:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2021-12-21 11:18:27,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:27,864 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:18:27,895 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 11:18:28,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:28,097 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash -266980119, now seen corresponding path program 1 times [2021-12-21 11:18:28,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:28,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432453501] [2021-12-21 11:18:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:28,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-12-21 11:18:28,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:28,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432453501] [2021-12-21 11:18:28,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432453501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:28,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:28,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:28,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677972253] [2021-12-21 11:18:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:28,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:28,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:28,379 INFO L87 Difference]: Start difference. First operand 5268 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 11:18:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:29,082 INFO L93 Difference]: Finished difference Result 11850 states and 12502 transitions. [2021-12-21 11:18:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:29,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 812 [2021-12-21 11:18:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:29,098 INFO L225 Difference]: With dead ends: 11850 [2021-12-21 11:18:29,098 INFO L226 Difference]: Without dead ends: 6913 [2021-12-21 11:18:29,103 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 11:18:29,104 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 219 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:29,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 81 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:18:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2021-12-21 11:18:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6584. [2021-12-21 11:18:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 1.0431414248822726) internal successors, (6867), 6583 states have internal predecessors, (6867), 0 states have call successors, (0), 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 11:18:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 6867 transitions. [2021-12-21 11:18:29,189 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 6867 transitions. Word has length 812 [2021-12-21 11:18:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:29,190 INFO L470 AbstractCegarLoop]: Abstraction has 6584 states and 6867 transitions. [2021-12-21 11:18:29,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 11:18:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 6867 transitions. [2021-12-21 11:18:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2021-12-21 11:18:29,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:29,201 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:18:29,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:18:29,201 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash -242754722, now seen corresponding path program 1 times [2021-12-21 11:18:29,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483492349] [2021-12-21 11:18:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:29,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2645 backedges. 1427 proven. 0 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2021-12-21 11:18:29,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:29,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483492349] [2021-12-21 11:18:29,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483492349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:29,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:29,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:29,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444291097] [2021-12-21 11:18:29,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:29,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:29,520 INFO L87 Difference]: Start difference. First operand 6584 states and 6867 transitions. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 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 11:18:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:30,194 INFO L93 Difference]: Finished difference Result 14153 states and 14797 transitions. [2021-12-21 11:18:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:30,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 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 1135 [2021-12-21 11:18:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:30,207 INFO L225 Difference]: With dead ends: 14153 [2021-12-21 11:18:30,208 INFO L226 Difference]: Without dead ends: 7900 [2021-12-21 11:18:30,213 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 11:18:30,213 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:30,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 439 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:18:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2021-12-21 11:18:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7571. [2021-12-21 11:18:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 1.038441215323646) internal successors, (7861), 7570 states have internal predecessors, (7861), 0 states have call successors, (0), 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 11:18:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7861 transitions. [2021-12-21 11:18:30,290 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7861 transitions. Word has length 1135 [2021-12-21 11:18:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:30,291 INFO L470 AbstractCegarLoop]: Abstraction has 7571 states and 7861 transitions. [2021-12-21 11:18:30,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 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 11:18:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7861 transitions. [2021-12-21 11:18:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1154 [2021-12-21 11:18:30,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:30,304 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:18:30,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:18:30,305 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash 693025521, now seen corresponding path program 1 times [2021-12-21 11:18:30,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:30,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418164307] [2021-12-21 11:18:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:30,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2662 backedges. 969 proven. 0 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2021-12-21 11:18:30,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:30,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418164307] [2021-12-21 11:18:30,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418164307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:30,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:30,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:30,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049878508] [2021-12-21 11:18:30,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:30,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:30,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:30,620 INFO L87 Difference]: Start difference. First operand 7571 states and 7861 transitions. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 11:18:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:31,331 INFO L93 Difference]: Finished difference Result 15798 states and 16386 transitions. [2021-12-21 11:18:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 1153 [2021-12-21 11:18:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:31,358 INFO L225 Difference]: With dead ends: 15798 [2021-12-21 11:18:31,358 INFO L226 Difference]: Without dead ends: 7571 [2021-12-21 11:18:31,362 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 11:18:31,362 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 172 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:31,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 410 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:18:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-12-21 11:18:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7571. [2021-12-21 11:18:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 1.0270805812417436) internal successors, (7775), 7570 states have internal predecessors, (7775), 0 states have call successors, (0), 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 11:18:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7775 transitions. [2021-12-21 11:18:31,418 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7775 transitions. Word has length 1153 [2021-12-21 11:18:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:31,419 INFO L470 AbstractCegarLoop]: Abstraction has 7571 states and 7775 transitions. [2021-12-21 11:18:31,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 11:18:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7775 transitions. [2021-12-21 11:18:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1462 [2021-12-21 11:18:31,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:31,434 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-21 11:18:31,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:18:31,435 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1231681156, now seen corresponding path program 1 times [2021-12-21 11:18:31,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:31,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380916413] [2021-12-21 11:18:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:31,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3648 backedges. 2647 proven. 0 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-12-21 11:18:31,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380916413] [2021-12-21 11:18:31,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380916413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:31,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:31,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:18:31,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305293719] [2021-12-21 11:18:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:31,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:18:31,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:18:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:18:31,936 INFO L87 Difference]: Start difference. First operand 7571 states and 7775 transitions. Second operand has 5 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 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 11:18:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:33,361 INFO L93 Difference]: Finished difference Result 15478 states and 15905 transitions. [2021-12-21 11:18:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:18:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 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 1461 [2021-12-21 11:18:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:33,374 INFO L225 Difference]: With dead ends: 15478 [2021-12-21 11:18:33,375 INFO L226 Difference]: Without dead ends: 8238 [2021-12-21 11:18:33,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:18:33,380 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 601 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:33,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 437 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:18:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-12-21 11:18:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7900. [2021-12-21 11:18:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.0275984301810355) internal successors, (8117), 7899 states have internal predecessors, (8117), 0 states have call successors, (0), 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 11:18:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8117 transitions. [2021-12-21 11:18:33,503 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8117 transitions. Word has length 1461 [2021-12-21 11:18:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:33,504 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 8117 transitions. [2021-12-21 11:18:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 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 11:18:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8117 transitions. [2021-12-21 11:18:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1611 [2021-12-21 11:18:33,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:33,523 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:33,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:18:33,524 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1231271717, now seen corresponding path program 1 times [2021-12-21 11:18:33,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:33,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801936263] [2021-12-21 11:18:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:33,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5097 backedges. 1351 proven. 0 refuted. 0 times theorem prover too weak. 3746 trivial. 0 not checked. [2021-12-21 11:18:34,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:34,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801936263] [2021-12-21 11:18:34,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801936263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:34,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:34,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:34,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348984499] [2021-12-21 11:18:34,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:34,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:34,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:34,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:34,054 INFO L87 Difference]: Start difference. First operand 7900 states and 8117 transitions. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 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 11:18:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:34,736 INFO L93 Difference]: Finished difference Result 17114 states and 17636 transitions. [2021-12-21 11:18:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 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 1610 [2021-12-21 11:18:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:34,748 INFO L225 Difference]: With dead ends: 17114 [2021-12-21 11:18:34,748 INFO L226 Difference]: Without dead ends: 9545 [2021-12-21 11:18:34,753 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 11:18:34,754 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 163 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:34,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 429 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:18:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2021-12-21 11:18:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 9216. [2021-12-21 11:18:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0258274552360283) internal successors, (9453), 9215 states have internal predecessors, (9453), 0 states have call successors, (0), 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 11:18:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9453 transitions. [2021-12-21 11:18:34,820 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9453 transitions. Word has length 1610 [2021-12-21 11:18:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:34,821 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9453 transitions. [2021-12-21 11:18:34,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 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 11:18:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9453 transitions. [2021-12-21 11:18:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1693 [2021-12-21 11:18:34,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:34,840 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:34,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:18:34,841 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1075096188, now seen corresponding path program 1 times [2021-12-21 11:18:34,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:34,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279530520] [2021-12-21 11:18:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:34,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5107 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 4883 trivial. 0 not checked. [2021-12-21 11:18:35,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279530520] [2021-12-21 11:18:35,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279530520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:35,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:18:35,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:18:35,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242533290] [2021-12-21 11:18:35,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:35,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:35,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:18:35,398 INFO L87 Difference]: Start difference. First operand 9216 states and 9453 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 11:18:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:36,032 INFO L93 Difference]: Finished difference Result 18430 states and 18903 transitions. [2021-12-21 11:18:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 1692 [2021-12-21 11:18:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:36,057 INFO L225 Difference]: With dead ends: 18430 [2021-12-21 11:18:36,057 INFO L226 Difference]: Without dead ends: 9216 [2021-12-21 11:18:36,064 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 11:18:36,065 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 308 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:36,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 418 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:18:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-12-21 11:18:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2021-12-21 11:18:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0172544763971785) internal successors, (9374), 9215 states have internal predecessors, (9374), 0 states have call successors, (0), 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 11:18:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9374 transitions. [2021-12-21 11:18:36,228 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9374 transitions. Word has length 1692 [2021-12-21 11:18:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:36,230 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9374 transitions. [2021-12-21 11:18:36,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 11:18:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9374 transitions. [2021-12-21 11:18:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1772 [2021-12-21 11:18:36,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:36,254 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:36,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:18:36,254 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1124083120, now seen corresponding path program 1 times [2021-12-21 11:18:36,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:36,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874514168] [2021-12-21 11:18:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:36,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 4415 proven. 132 refuted. 0 times theorem prover too weak. 1823 trivial. 0 not checked. [2021-12-21 11:18:36,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:36,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874514168] [2021-12-21 11:18:36,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874514168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:36,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102543175] [2021-12-21 11:18:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:36,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:36,769 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 11:18:36,814 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 11:18:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:37,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:18:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:18:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2545 proven. 201 refuted. 0 times theorem prover too weak. 3624 trivial. 0 not checked. [2021-12-21 11:18:41,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:18:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2545 proven. 201 refuted. 0 times theorem prover too weak. 3624 trivial. 0 not checked. [2021-12-21 11:18:48,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102543175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:18:48,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:18:48,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-21 11:18:48,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25412624] [2021-12-21 11:18:48,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:18:48,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 11:18:48,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 11:18:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:18:48,707 INFO L87 Difference]: Start difference. First operand 9216 states and 9374 transitions. Second operand has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 0 states have call successors, (0), 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 11:18:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:53,854 INFO L93 Difference]: Finished difference Result 31919 states and 32493 transitions. [2021-12-21 11:18:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 11:18:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 0 states have call successors, (0), 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 1771 [2021-12-21 11:18:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:53,881 INFO L225 Difference]: With dead ends: 31919 [2021-12-21 11:18:53,881 INFO L226 Difference]: Without dead ends: 23034 [2021-12-21 11:18:53,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3567 GetRequests, 3549 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-21 11:18:53,890 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3256 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 8267 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 8730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 8267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:53,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3256 Valid, 106 Invalid, 8730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 8267 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-21 11:18:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23034 states. [2021-12-21 11:18:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23034 to 14480. [2021-12-21 11:18:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0164375992817183) internal successors, (14717), 14479 states have internal predecessors, (14717), 0 states have call successors, (0), 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 11:18:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14717 transitions. [2021-12-21 11:18:54,051 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14717 transitions. Word has length 1771 [2021-12-21 11:18:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:54,052 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14717 transitions. [2021-12-21 11:18:54,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 0 states have call successors, (0), 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 11:18:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14717 transitions. [2021-12-21 11:18:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1864 [2021-12-21 11:18:54,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:54,083 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:54,104 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 11:18:54,301 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 11:18:54,302 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash 485465815, now seen corresponding path program 1 times [2021-12-21 11:18:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:54,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722247998] [2021-12-21 11:18:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:54,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7419 backedges. 2658 proven. 156 refuted. 0 times theorem prover too weak. 4605 trivial. 0 not checked. [2021-12-21 11:18:54,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722247998] [2021-12-21 11:18:54,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722247998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282494790] [2021-12-21 11:18:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:54,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:54,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:18:54,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:18:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 2188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:18:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:18:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7419 backedges. 2814 proven. 0 refuted. 0 times theorem prover too weak. 4605 trivial. 0 not checked. [2021-12-21 11:18:58,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:18:58,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282494790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:58,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:18:58,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:18:58,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725516839] [2021-12-21 11:18:58,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:58,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:58,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:18:58,080 INFO L87 Difference]: Start difference. First operand 14480 states and 14717 transitions. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 11:18:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:58,837 INFO L93 Difference]: Finished difference Result 29945 states and 30455 transitions. [2021-12-21 11:18:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 1863 [2021-12-21 11:18:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:58,857 INFO L225 Difference]: With dead ends: 29945 [2021-12-21 11:18:58,857 INFO L226 Difference]: Without dead ends: 15796 [2021-12-21 11:18:58,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1867 GetRequests, 1862 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:18:58,868 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:58,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 93 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:18:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-21 11:18:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15796. [2021-12-21 11:18:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.0157011712567268) internal successors, (16043), 15795 states have internal predecessors, (16043), 0 states have call successors, (0), 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 11:18:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16043 transitions. [2021-12-21 11:18:58,996 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16043 transitions. Word has length 1863 [2021-12-21 11:18:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:58,997 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 16043 transitions. [2021-12-21 11:18:58,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 11:18:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16043 transitions. [2021-12-21 11:18:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1972 [2021-12-21 11:18:59,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:59,021 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:18:59,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:18:59,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:59,240 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1056864243, now seen corresponding path program 1 times [2021-12-21 11:18:59,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:59,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218171654] [2021-12-21 11:18:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:59,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7432 backedges. 4066 proven. 1581 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2021-12-21 11:18:59,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:59,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218171654] [2021-12-21 11:18:59,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218171654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:59,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286885894] [2021-12-21 11:18:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:59,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:59,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:18:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:19:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:19:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:19:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:19:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7432 backedges. 4042 proven. 0 refuted. 0 times theorem prover too weak. 3390 trivial. 0 not checked. [2021-12-21 11:19:02,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:19:02,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286885894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:19:02,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:19:02,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:19:02,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903496792] [2021-12-21 11:19:02,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:19:02,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:19:02,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:19:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:19:02,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:19:02,574 INFO L87 Difference]: Start difference. First operand 15796 states and 16043 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 11:19:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:19:03,146 INFO L93 Difference]: Finished difference Result 31590 states and 32086 transitions. [2021-12-21 11:19:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:19:03,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 1971 [2021-12-21 11:19:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:19:03,202 INFO L225 Difference]: With dead ends: 31590 [2021-12-21 11:19:03,203 INFO L226 Difference]: Without dead ends: 16125 [2021-12-21 11:19:03,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1976 GetRequests, 1972 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:19:03,228 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:19:03,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 427 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 11:19:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2021-12-21 11:19:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 15796. [2021-12-21 11:19:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.0156378600823046) internal successors, (16042), 15795 states have internal predecessors, (16042), 0 states have call successors, (0), 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 11:19:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16042 transitions. [2021-12-21 11:19:03,591 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16042 transitions. Word has length 1971 [2021-12-21 11:19:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:19:03,592 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 16042 transitions. [2021-12-21 11:19:03,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 11:19:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16042 transitions. [2021-12-21 11:19:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2185 [2021-12-21 11:19:03,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:19:03,643 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 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 11:19:03,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 11:19:03,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 11:19:03,862 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:19:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:19:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1112899034, now seen corresponding path program 1 times [2021-12-21 11:19:03,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:19:03,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189041155] [2021-12-21 11:19:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:19:03,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:19:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:19:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8627 backedges. 4353 proven. 1035 refuted. 0 times theorem prover too weak. 3239 trivial. 0 not checked. [2021-12-21 11:19:04,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:19:04,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189041155] [2021-12-21 11:19:04,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189041155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:19:04,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126502028] [2021-12-21 11:19:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:19:04,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:19:04,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:19:04,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:19:04,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 11:19:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:19:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:19:05,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:19:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8627 backedges. 4812 proven. 0 refuted. 0 times theorem prover too weak. 3815 trivial. 0 not checked. [2021-12-21 11:19:07,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:19:07,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126502028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:19:07,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:19:07,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:19:07,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398636607] [2021-12-21 11:19:07,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:19:07,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:19:07,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:19:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:19:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:19:07,194 INFO L87 Difference]: Start difference. First operand 15796 states and 16042 transitions. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 11:19:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:19:07,957 INFO L93 Difference]: Finished difference Result 33235 states and 33768 transitions. [2021-12-21 11:19:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:19:07,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 2184 [2021-12-21 11:19:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:19:07,978 INFO L225 Difference]: With dead ends: 33235 [2021-12-21 11:19:07,978 INFO L226 Difference]: Without dead ends: 17770 [2021-12-21 11:19:07,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2192 GetRequests, 2185 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:19:07,988 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:19:07,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 425 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:19:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17770 states. [2021-12-21 11:19:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17770 to 17441. [2021-12-21 11:19:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17441 states, 17440 states have (on average 1.0152522935779817) internal successors, (17706), 17440 states have internal predecessors, (17706), 0 states have call successors, (0), 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 11:19:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17441 states to 17441 states and 17706 transitions. [2021-12-21 11:19:08,134 INFO L78 Accepts]: Start accepts. Automaton has 17441 states and 17706 transitions. Word has length 2184 [2021-12-21 11:19:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:19:08,135 INFO L470 AbstractCegarLoop]: Abstraction has 17441 states and 17706 transitions. [2021-12-21 11:19:08,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 11:19:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 17441 states and 17706 transitions. [2021-12-21 11:19:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2216 [2021-12-21 11:19:08,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:19:08,164 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 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 11:19:08,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 11:19:08,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 11:19:08,383 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:19:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:19:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash 426290815, now seen corresponding path program 1 times [2021-12-21 11:19:08,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:19:08,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957944724] [2021-12-21 11:19:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:19:08,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:19:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:19:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 4478 proven. 1066 refuted. 0 times theorem prover too weak. 3534 trivial. 0 not checked. [2021-12-21 11:19:09,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:19:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957944724] [2021-12-21 11:19:09,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957944724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:19:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708254102] [2021-12-21 11:19:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:19:09,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:19:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:19:09,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:19:09,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 11:19:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:19:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:19:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:19:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 1821 proven. 0 refuted. 0 times theorem prover too weak. 7257 trivial. 0 not checked. [2021-12-21 11:19:17,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:19:17,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708254102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:19:17,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:19:17,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:19:17,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061611140] [2021-12-21 11:19:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:19:17,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:19:17,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:19:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:19:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:19:17,425 INFO L87 Difference]: Start difference. First operand 17441 states and 17706 transitions. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 11:19:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:19:17,504 INFO L93 Difference]: Finished difference Result 17941 states and 18211 transitions. [2021-12-21 11:19:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:19:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 2215 [2021-12-21 11:19:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:19:17,518 INFO L225 Difference]: With dead ends: 17941 [2021-12-21 11:19:17,535 INFO L226 Difference]: Without dead ends: 17610 [2021-12-21 11:19:17,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2223 GetRequests, 2216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:19:17,555 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:19:17,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 428 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 582 Unchecked, 0.0s Time] [2021-12-21 11:19:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17610 states. [2021-12-21 11:19:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17610 to 17610. [2021-12-21 11:19:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17610 states, 17609 states have (on average 1.0153330683173378) internal successors, (17879), 17609 states have internal predecessors, (17879), 0 states have call successors, (0), 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 11:19:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17610 states to 17610 states and 17879 transitions. [2021-12-21 11:19:17,858 INFO L78 Accepts]: Start accepts. Automaton has 17610 states and 17879 transitions. Word has length 2215 [2021-12-21 11:19:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:19:17,860 INFO L470 AbstractCegarLoop]: Abstraction has 17610 states and 17879 transitions. [2021-12-21 11:19:17,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 11:19:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 17610 states and 17879 transitions. [2021-12-21 11:19:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2282 [2021-12-21 11:19:17,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:19:17,889 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 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 11:19:17,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 11:19:18,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 11:19:18,109 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:19:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:19:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1883193190, now seen corresponding path program 1 times [2021-12-21 11:19:18,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:19:18,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044210523] [2021-12-21 11:19:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:19:18,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:19:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat