./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label46.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem15_label46.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 e6cfda55b4df00060532ae07426d70949a0fc78613832cd8fb2b21614956b3d6 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:52:19,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:52:19,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:52:19,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:52:19,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:52:19,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:52:19,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:52:19,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:52:19,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:52:19,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:52:19,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:52:19,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:52:19,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:52:19,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:52:19,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:52:19,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:52:19,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:52:19,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:52:19,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:52:19,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:52:19,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:52:19,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:52:19,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:52:19,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:52:19,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:52:19,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:52:19,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:52:19,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:52:19,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:52:19,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:52:19,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:52:19,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:52:19,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:52:19,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:52:19,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:52:19,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:52:19,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:52:19,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:52:19,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:52:19,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:52:19,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:52:19,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:52:19,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:52:19,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:52:19,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:52:19,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:52:19,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:52:19,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:52:19,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:52:19,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:52:19,310 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:52:19,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:52:19,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:52:19,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:52:19,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:52:19,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:52:19,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:52:19,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:52:19,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:52:19,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:52:19,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:52:19,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:52:19,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:52:19,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:52:19,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:52:19,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:52:19,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:52:19,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:52:19,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:52:19,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:52:19,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:52:19,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:52:19,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:52:19,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:52:19,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:52:19,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:52:19,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6cfda55b4df00060532ae07426d70949a0fc78613832cd8fb2b21614956b3d6 [2021-12-15 09:52:19,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:52:19,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:52:19,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:52:19,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:52:19,543 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:52:19,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label46.c [2021-12-15 09:52:19,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7afebc2b/870d219641ce4ad39a540b2df12ae998/FLAGc3bd74030 [2021-12-15 09:52:20,026 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:52:20,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label46.c [2021-12-15 09:52:20,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7afebc2b/870d219641ce4ad39a540b2df12ae998/FLAGc3bd74030 [2021-12-15 09:52:20,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7afebc2b/870d219641ce4ad39a540b2df12ae998 [2021-12-15 09:52:20,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:52:20,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:52:20,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:52:20,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:52:20,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:52:20,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:52:20" (1/1) ... [2021-12-15 09:52:20,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a860c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:20, skipping insertion in model container [2021-12-15 09:52:20,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:52:20" (1/1) ... [2021-12-15 09:52:20,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:52:20,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:52:20,626 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/Problem15_label46.c[5357,5370] [2021-12-15 09:52:20,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:52:20,897 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:52:20,922 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/Problem15_label46.c[5357,5370] [2021-12-15 09:52:21,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:52:21,067 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:52:21,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21 WrapperNode [2021-12-15 09:52:21,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:52:21,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:52:21,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:52:21,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:52:21,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,218 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-15 09:52:21,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:52:21,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:52:21,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:52:21,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:52:21,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:52:21,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:52:21,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:52:21,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:52:21,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (1/1) ... [2021-12-15 09:52:21,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:52:21,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:21,427 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) [2021-12-15 09:52:21,430 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 [2021-12-15 09:52:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:52:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:52:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:52:21,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:52:21,514 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:52:21,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:52:23,394 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:52:23,403 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:52:23,406 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:52:23,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:52:23 BoogieIcfgContainer [2021-12-15 09:52:23,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:52:23,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:52:23,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:52:23,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:52:23,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:52:20" (1/3) ... [2021-12-15 09:52:23,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5435ab86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:52:23, skipping insertion in model container [2021-12-15 09:52:23,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:21" (2/3) ... [2021-12-15 09:52:23,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5435ab86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:52:23, skipping insertion in model container [2021-12-15 09:52:23,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:52:23" (3/3) ... [2021-12-15 09:52:23,415 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label46.c [2021-12-15 09:52:23,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:52:23,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:52:23,457 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:52:23,463 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 [2021-12-15 09:52:23,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:52:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 09:52:23,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:23,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:23,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-12-15 09:52:23,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:23,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904835296] [2021-12-15 09:52:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:23,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:23,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:23,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904835296] [2021-12-15 09:52:23,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904835296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:23,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:23,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:23,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547014297] [2021-12-15 09:52:23,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:23,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:23,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:23,749 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:25,563 INFO L93 Difference]: Finished difference Result 1191 states and 2157 transitions. [2021-12-15 09:52:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-15 09:52:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:25,576 INFO L225 Difference]: With dead ends: 1191 [2021-12-15 09:52:25,576 INFO L226 Difference]: Without dead ends: 688 [2021-12-15 09:52:25,580 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 [2021-12-15 09:52:25,583 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 328 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:25,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 230 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:52:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-15 09:52:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 680. [2021-12-15 09:52:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.609720176730486) internal successors, (1093), 679 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1093 transitions. [2021-12-15 09:52:25,633 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1093 transitions. Word has length 43 [2021-12-15 09:52:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:25,633 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1093 transitions. [2021-12-15 09:52:25,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1093 transitions. [2021-12-15 09:52:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 09:52:25,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:25,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:25,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:52:25,637 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash 618077297, now seen corresponding path program 1 times [2021-12-15 09:52:25,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:25,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774937285] [2021-12-15 09:52:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:25,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:25,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774937285] [2021-12-15 09:52:25,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774937285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:25,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:25,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:25,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646081005] [2021-12-15 09:52:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:25,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:25,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:25,734 INFO L87 Difference]: Start difference. First operand 680 states and 1093 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:26,946 INFO L93 Difference]: Finished difference Result 1964 states and 3171 transitions. [2021-12-15 09:52:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-15 09:52:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:26,950 INFO L225 Difference]: With dead ends: 1964 [2021-12-15 09:52:26,950 INFO L226 Difference]: Without dead ends: 1286 [2021-12-15 09:52:26,952 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 [2021-12-15 09:52:26,953 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 282 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:26,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 360 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:52:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-12-15 09:52:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1281. [2021-12-15 09:52:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 1.3953125) internal successors, (1786), 1280 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1786 transitions. [2021-12-15 09:52:26,979 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1786 transitions. Word has length 111 [2021-12-15 09:52:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1786 transitions. [2021-12-15 09:52:26,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1786 transitions. [2021-12-15 09:52:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 09:52:26,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:26,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:26,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:52:26,983 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1137270533, now seen corresponding path program 1 times [2021-12-15 09:52:26,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:26,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251369203] [2021-12-15 09:52:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:26,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:27,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251369203] [2021-12-15 09:52:27,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251369203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:27,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:27,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:27,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244862747] [2021-12-15 09:52:27,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:27,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:27,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:27,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:27,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:27,046 INFO L87 Difference]: Start difference. First operand 1281 states and 1786 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:28,375 INFO L93 Difference]: Finished difference Result 3766 states and 5246 transitions. [2021-12-15 09:52:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-15 09:52:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:28,383 INFO L225 Difference]: With dead ends: 3766 [2021-12-15 09:52:28,383 INFO L226 Difference]: Without dead ends: 2487 [2021-12-15 09:52:28,385 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 [2021-12-15 09:52:28,390 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 285 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:28,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 637 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-12-15 09:52:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2487. [2021-12-15 09:52:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.244569589702333) internal successors, (3094), 2486 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3094 transitions. [2021-12-15 09:52:28,423 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3094 transitions. Word has length 119 [2021-12-15 09:52:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:28,425 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3094 transitions. [2021-12-15 09:52:28,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3094 transitions. [2021-12-15 09:52:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-15 09:52:28,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:28,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:28,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:52:28,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash -724585743, now seen corresponding path program 1 times [2021-12-15 09:52:28,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:28,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391573555] [2021-12-15 09:52:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:28,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:28,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391573555] [2021-12-15 09:52:28,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391573555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:28,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:28,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:28,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155057759] [2021-12-15 09:52:28,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:28,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:28,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:28,540 INFO L87 Difference]: Start difference. First operand 2487 states and 3094 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:29,878 INFO L93 Difference]: Finished difference Result 6173 states and 7859 transitions. [2021-12-15 09:52:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:29,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-12-15 09:52:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:29,890 INFO L225 Difference]: With dead ends: 6173 [2021-12-15 09:52:29,890 INFO L226 Difference]: Without dead ends: 3688 [2021-12-15 09:52:29,894 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 [2021-12-15 09:52:29,899 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 233 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:29,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 364 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2021-12-15 09:52:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 3387. [2021-12-15 09:52:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.2114589486119314) internal successors, (4102), 3386 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4102 transitions. [2021-12-15 09:52:29,944 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4102 transitions. Word has length 125 [2021-12-15 09:52:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:29,945 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4102 transitions. [2021-12-15 09:52:29,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4102 transitions. [2021-12-15 09:52:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-15 09:52:29,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:29,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:29,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:52:29,948 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1572668496, now seen corresponding path program 1 times [2021-12-15 09:52:29,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001463618] [2021-12-15 09:52:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:29,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:30,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001463618] [2021-12-15 09:52:30,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001463618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:30,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:30,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:30,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819069920] [2021-12-15 09:52:30,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:30,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:30,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:30,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:30,092 INFO L87 Difference]: Start difference. First operand 3387 states and 4102 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:31,468 INFO L93 Difference]: Finished difference Result 7974 states and 9877 transitions. [2021-12-15 09:52:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-12-15 09:52:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:31,483 INFO L225 Difference]: With dead ends: 7974 [2021-12-15 09:52:31,483 INFO L226 Difference]: Without dead ends: 4589 [2021-12-15 09:52:31,487 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 [2021-12-15 09:52:31,487 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 285 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:31,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 614 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-12-15 09:52:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 4587. [2021-12-15 09:52:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 1.181639773222852) internal successors, (5419), 4586 states have internal predecessors, (5419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 5419 transitions. [2021-12-15 09:52:31,554 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 5419 transitions. Word has length 239 [2021-12-15 09:52:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:31,555 INFO L470 AbstractCegarLoop]: Abstraction has 4587 states and 5419 transitions. [2021-12-15 09:52:31,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 5419 transitions. [2021-12-15 09:52:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-15 09:52:31,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:31,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:31,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:52:31,562 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:31,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:31,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1448476508, now seen corresponding path program 1 times [2021-12-15 09:52:31,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:31,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262200151] [2021-12-15 09:52:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:31,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 09:52:31,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262200151] [2021-12-15 09:52:31,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262200151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:31,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:31,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:31,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126722150] [2021-12-15 09:52:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:31,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:31,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:31,730 INFO L87 Difference]: Start difference. First operand 4587 states and 5419 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:32,997 INFO L93 Difference]: Finished difference Result 12171 states and 14464 transitions. [2021-12-15 09:52:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:32,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 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 325 [2021-12-15 09:52:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:33,013 INFO L225 Difference]: With dead ends: 12171 [2021-12-15 09:52:33,014 INFO L226 Difference]: Without dead ends: 7586 [2021-12-15 09:52:33,016 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 [2021-12-15 09:52:33,017 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 31 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:33,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 315 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:52:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7586 states. [2021-12-15 09:52:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7586 to 6985. [2021-12-15 09:52:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.1539232531500572) internal successors, (8059), 6984 states have internal predecessors, (8059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 8059 transitions. [2021-12-15 09:52:33,087 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 8059 transitions. Word has length 325 [2021-12-15 09:52:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:33,087 INFO L470 AbstractCegarLoop]: Abstraction has 6985 states and 8059 transitions. [2021-12-15 09:52:33,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 8059 transitions. [2021-12-15 09:52:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-15 09:52:33,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:33,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:33,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:52:33,093 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:33,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1803521659, now seen corresponding path program 1 times [2021-12-15 09:52:33,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:33,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671588392] [2021-12-15 09:52:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:33,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:33,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:33,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671588392] [2021-12-15 09:52:33,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671588392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:33,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:33,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:33,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871806806] [2021-12-15 09:52:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:33,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:33,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:33,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:33,214 INFO L87 Difference]: Start difference. First operand 6985 states and 8059 transitions. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:34,606 INFO L93 Difference]: Finished difference Result 15770 states and 18503 transitions. [2021-12-15 09:52:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:34,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406 [2021-12-15 09:52:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:34,627 INFO L225 Difference]: With dead ends: 15770 [2021-12-15 09:52:34,627 INFO L226 Difference]: Without dead ends: 8787 [2021-12-15 09:52:34,633 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 [2021-12-15 09:52:34,634 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 248 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:34,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 628 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8787 states. [2021-12-15 09:52:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8787 to 8481. [2021-12-15 09:52:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8481 states, 8480 states have (on average 1.1386792452830188) internal successors, (9656), 8480 states have internal predecessors, (9656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8481 states to 8481 states and 9656 transitions. [2021-12-15 09:52:34,750 INFO L78 Accepts]: Start accepts. Automaton has 8481 states and 9656 transitions. Word has length 406 [2021-12-15 09:52:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:34,751 INFO L470 AbstractCegarLoop]: Abstraction has 8481 states and 9656 transitions. [2021-12-15 09:52:34,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8481 states and 9656 transitions. [2021-12-15 09:52:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-12-15 09:52:34,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:34,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:34,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:52:34,757 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:34,757 INFO L85 PathProgramCache]: Analyzing trace with hash -530328079, now seen corresponding path program 1 times [2021-12-15 09:52:34,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:34,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446658038] [2021-12-15 09:52:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:34,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 09:52:34,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:34,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446658038] [2021-12-15 09:52:34,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446658038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:34,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:34,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:34,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127535504] [2021-12-15 09:52:34,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:34,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:34,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:34,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:34,862 INFO L87 Difference]: Start difference. First operand 8481 states and 9656 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:36,321 INFO L93 Difference]: Finished difference Result 20249 states and 23173 transitions. [2021-12-15 09:52:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:36,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 416 [2021-12-15 09:52:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:36,372 INFO L225 Difference]: With dead ends: 20249 [2021-12-15 09:52:36,372 INFO L226 Difference]: Without dead ends: 11770 [2021-12-15 09:52:36,386 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 [2021-12-15 09:52:36,387 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 273 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:36,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 309 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:52:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11770 states. [2021-12-15 09:52:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11770 to 7578. [2021-12-15 09:52:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7578 states, 7577 states have (on average 1.1493994984822489) internal successors, (8709), 7577 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7578 states to 7578 states and 8709 transitions. [2021-12-15 09:52:36,485 INFO L78 Accepts]: Start accepts. Automaton has 7578 states and 8709 transitions. Word has length 416 [2021-12-15 09:52:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:36,485 INFO L470 AbstractCegarLoop]: Abstraction has 7578 states and 8709 transitions. [2021-12-15 09:52:36,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 7578 states and 8709 transitions. [2021-12-15 09:52:36,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-12-15 09:52:36,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:36,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:36,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:52:36,492 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -795125265, now seen corresponding path program 1 times [2021-12-15 09:52:36,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:36,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48924860] [2021-12-15 09:52:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:36,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-15 09:52:36,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:36,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48924860] [2021-12-15 09:52:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48924860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:36,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:36,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:36,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4445162] [2021-12-15 09:52:36,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:36,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:36,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:36,652 INFO L87 Difference]: Start difference. First operand 7578 states and 8709 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:38,125 INFO L93 Difference]: Finished difference Result 15453 states and 17727 transitions. [2021-12-15 09:52:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 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 433 [2021-12-15 09:52:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:38,137 INFO L225 Difference]: With dead ends: 15453 [2021-12-15 09:52:38,138 INFO L226 Difference]: Without dead ends: 7877 [2021-12-15 09:52:38,144 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 [2021-12-15 09:52:38,145 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:38,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 354 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:52:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7877 states. [2021-12-15 09:52:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7877 to 7877. [2021-12-15 09:52:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7877 states, 7876 states have (on average 1.1444895886236668) internal successors, (9014), 7876 states have internal predecessors, (9014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7877 states to 7877 states and 9014 transitions. [2021-12-15 09:52:38,215 INFO L78 Accepts]: Start accepts. Automaton has 7877 states and 9014 transitions. Word has length 433 [2021-12-15 09:52:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:38,216 INFO L470 AbstractCegarLoop]: Abstraction has 7877 states and 9014 transitions. [2021-12-15 09:52:38,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 7877 states and 9014 transitions. [2021-12-15 09:52:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-15 09:52:38,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:38,222 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:38,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:52:38,222 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -299601891, now seen corresponding path program 1 times [2021-12-15 09:52:38,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:38,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350936038] [2021-12-15 09:52:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:38,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-15 09:52:38,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:38,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350936038] [2021-12-15 09:52:38,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350936038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:38,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:38,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:38,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015797338] [2021-12-15 09:52:38,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:38,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:38,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:38,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:38,376 INFO L87 Difference]: Start difference. First operand 7877 states and 9014 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:40,098 INFO L93 Difference]: Finished difference Result 17844 states and 20678 transitions. [2021-12-15 09:52:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 507 [2021-12-15 09:52:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:40,112 INFO L225 Difference]: With dead ends: 17844 [2021-12-15 09:52:40,113 INFO L226 Difference]: Without dead ends: 10268 [2021-12-15 09:52:40,119 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 [2021-12-15 09:52:40,120 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 372 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:40,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 447 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:52:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2021-12-15 09:52:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10268. [2021-12-15 09:52:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10268 states, 10267 states have (on average 1.146878348105581) internal successors, (11775), 10267 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10268 states to 10268 states and 11775 transitions. [2021-12-15 09:52:40,214 INFO L78 Accepts]: Start accepts. Automaton has 10268 states and 11775 transitions. Word has length 507 [2021-12-15 09:52:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:40,215 INFO L470 AbstractCegarLoop]: Abstraction has 10268 states and 11775 transitions. [2021-12-15 09:52:40,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 10268 states and 11775 transitions. [2021-12-15 09:52:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2021-12-15 09:52:40,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:40,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:40,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:52:40,220 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1686723748, now seen corresponding path program 1 times [2021-12-15 09:52:40,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:40,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267083011] [2021-12-15 09:52:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:40,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-15 09:52:40,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267083011] [2021-12-15 09:52:40,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267083011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:40,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:40,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:40,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584668287] [2021-12-15 09:52:40,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:40,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:40,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:40,358 INFO L87 Difference]: Start difference. First operand 10268 states and 11775 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:41,753 INFO L93 Difference]: Finished difference Result 25033 states and 28938 transitions. [2021-12-15 09:52:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 531 [2021-12-15 09:52:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:41,775 INFO L225 Difference]: With dead ends: 25033 [2021-12-15 09:52:41,775 INFO L226 Difference]: Without dead ends: 15066 [2021-12-15 09:52:41,783 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 [2021-12-15 09:52:41,784 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 248 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:41,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 619 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15066 states. [2021-12-15 09:52:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15066 to 15055. [2021-12-15 09:52:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15055 states, 15054 states have (on average 1.1306629467251228) internal successors, (17021), 15054 states have internal predecessors, (17021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15055 states to 15055 states and 17021 transitions. [2021-12-15 09:52:41,936 INFO L78 Accepts]: Start accepts. Automaton has 15055 states and 17021 transitions. Word has length 531 [2021-12-15 09:52:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:41,937 INFO L470 AbstractCegarLoop]: Abstraction has 15055 states and 17021 transitions. [2021-12-15 09:52:41,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15055 states and 17021 transitions. [2021-12-15 09:52:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-12-15 09:52:41,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:41,945 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:41,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:52:41,945 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:41,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2137585242, now seen corresponding path program 1 times [2021-12-15 09:52:41,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:41,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233190242] [2021-12-15 09:52:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:41,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-12-15 09:52:42,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233190242] [2021-12-15 09:52:42,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233190242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:42,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:42,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:42,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519324034] [2021-12-15 09:52:42,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:42,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:42,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:42,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:42,089 INFO L87 Difference]: Start difference. First operand 15055 states and 17021 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:43,331 INFO L93 Difference]: Finished difference Result 31005 states and 35004 transitions. [2021-12-15 09:52:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 585 [2021-12-15 09:52:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:43,348 INFO L225 Difference]: With dead ends: 31005 [2021-12-15 09:52:43,348 INFO L226 Difference]: Without dead ends: 15055 [2021-12-15 09:52:43,357 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 [2021-12-15 09:52:43,358 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 259 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:43,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 666 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:52:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15055 states. [2021-12-15 09:52:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15055 to 15055. [2021-12-15 09:52:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15055 states, 15054 states have (on average 1.1287365484256675) internal successors, (16992), 15054 states have internal predecessors, (16992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15055 states to 15055 states and 16992 transitions. [2021-12-15 09:52:43,484 INFO L78 Accepts]: Start accepts. Automaton has 15055 states and 16992 transitions. Word has length 585 [2021-12-15 09:52:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:43,485 INFO L470 AbstractCegarLoop]: Abstraction has 15055 states and 16992 transitions. [2021-12-15 09:52:43,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 15055 states and 16992 transitions. [2021-12-15 09:52:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-15 09:52:43,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:43,493 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 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] [2021-12-15 09:52:43,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:52:43,493 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1367354222, now seen corresponding path program 1 times [2021-12-15 09:52:43,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:43,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764499664] [2021-12-15 09:52:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:43,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 578 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-15 09:52:43,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764499664] [2021-12-15 09:52:43,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764499664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255663607] [2021-12-15 09:52:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:43,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:43,640 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) [2021-12-15 09:52:43,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:52:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:52:43,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 578 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-15 09:52:45,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:52:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 578 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-15 09:52:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255663607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:52:46,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:52:46,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 09:52:46,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145346789] [2021-12-15 09:52:46,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:52:46,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:52:46,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:52:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:52:46,433 INFO L87 Difference]: Start difference. First operand 15055 states and 16992 transitions. Second operand has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:51,250 INFO L93 Difference]: Finished difference Result 38143 states and 42794 transitions. [2021-12-15 09:52:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 09:52:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 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 598 [2021-12-15 09:52:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:51,275 INFO L225 Difference]: With dead ends: 38143 [2021-12-15 09:52:51,276 INFO L226 Difference]: Without dead ends: 17747 [2021-12-15 09:52:51,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1191 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-15 09:52:51,290 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 3071 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5629 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3071 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 6307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 5629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:51,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3071 Valid, 246 Invalid, 6307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 5629 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-15 09:52:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17747 states. [2021-12-15 09:52:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17747 to 13558. [2021-12-15 09:52:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13558 states, 13557 states have (on average 1.0706646013129748) internal successors, (14515), 13557 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13558 states to 13558 states and 14515 transitions. [2021-12-15 09:52:51,486 INFO L78 Accepts]: Start accepts. Automaton has 13558 states and 14515 transitions. Word has length 598 [2021-12-15 09:52:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:51,487 INFO L470 AbstractCegarLoop]: Abstraction has 13558 states and 14515 transitions. [2021-12-15 09:52:51,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 13558 states and 14515 transitions. [2021-12-15 09:52:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2021-12-15 09:52:51,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:51,498 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:51,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:52:51,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 09:52:51,707 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash 910843091, now seen corresponding path program 1 times [2021-12-15 09:52:51,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698264113] [2021-12-15 09:52:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:51,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-12-15 09:52:51,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:51,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698264113] [2021-12-15 09:52:51,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698264113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:51,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:51,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:51,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580062654] [2021-12-15 09:52:51,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:51,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:51,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:51,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:51,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:51,841 INFO L87 Difference]: Start difference. First operand 13558 states and 14515 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:52,700 INFO L93 Difference]: Finished difference Result 26813 states and 28725 transitions. [2021-12-15 09:52:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 623 [2021-12-15 09:52:52,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:52,714 INFO L225 Difference]: With dead ends: 26813 [2021-12-15 09:52:52,714 INFO L226 Difference]: Without dead ends: 13556 [2021-12-15 09:52:52,723 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 [2021-12-15 09:52:52,723 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 437 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:52,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 69 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:52:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13556 states. [2021-12-15 09:52:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13556 to 13556. [2021-12-15 09:52:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13556 states, 13555 states have (on average 1.0705274806344522) internal successors, (14511), 13555 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13556 states to 13556 states and 14511 transitions. [2021-12-15 09:52:52,848 INFO L78 Accepts]: Start accepts. Automaton has 13556 states and 14511 transitions. Word has length 623 [2021-12-15 09:52:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:52,848 INFO L470 AbstractCegarLoop]: Abstraction has 13556 states and 14511 transitions. [2021-12-15 09:52:52,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 13556 states and 14511 transitions. [2021-12-15 09:52:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2021-12-15 09:52:52,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:52,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:52:52,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:52:52,856 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -705848768, now seen corresponding path program 1 times [2021-12-15 09:52:52,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:52,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442805749] [2021-12-15 09:52:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:52,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 364 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-15 09:52:53,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442805749] [2021-12-15 09:52:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442805749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314031043] [2021-12-15 09:52:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:53,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:53,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:53,145 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) [2021-12-15 09:52:53,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:52:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:53,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:52:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-12-15 09:52:54,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:52:54,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314031043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:54,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:52:54,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 09:52:54,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919452145] [2021-12-15 09:52:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:54,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:52:54,010 INFO L87 Difference]: Start difference. First operand 13556 states and 14511 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:54,878 INFO L93 Difference]: Finished difference Result 27106 states and 29013 transitions. [2021-12-15 09:52:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 639 [2021-12-15 09:52:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:54,892 INFO L225 Difference]: With dead ends: 27106 [2021-12-15 09:52:54,892 INFO L226 Difference]: Without dead ends: 13552 [2021-12-15 09:52:54,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:52:54,901 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 286 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:54,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 520 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:52:54,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13552 states. [2021-12-15 09:52:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13552 to 12654. [2021-12-15 09:52:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12654 states, 12653 states have (on average 1.0376985695092074) internal successors, (13130), 12653 states have internal predecessors, (13130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12654 states to 12654 states and 13130 transitions. [2021-12-15 09:52:55,014 INFO L78 Accepts]: Start accepts. Automaton has 12654 states and 13130 transitions. Word has length 639 [2021-12-15 09:52:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:55,014 INFO L470 AbstractCegarLoop]: Abstraction has 12654 states and 13130 transitions. [2021-12-15 09:52:55,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 12654 states and 13130 transitions. [2021-12-15 09:52:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-12-15 09:52:55,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:55,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:52:55,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:52:55,222 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,SelfDestructingSolverStorable14 [2021-12-15 09:52:55,222 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash 777769454, now seen corresponding path program 1 times [2021-12-15 09:52:55,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:55,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386219676] [2021-12-15 09:52:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:55,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-12-15 09:52:55,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386219676] [2021-12-15 09:52:55,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386219676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:55,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:55,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:55,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398057057] [2021-12-15 09:52:55,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:55,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:55,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:55,401 INFO L87 Difference]: Start difference. First operand 12654 states and 13130 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:56,386 INFO L93 Difference]: Finished difference Result 27714 states and 28795 transitions. [2021-12-15 09:52:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 668 [2021-12-15 09:52:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:56,402 INFO L225 Difference]: With dead ends: 27714 [2021-12-15 09:52:56,402 INFO L226 Difference]: Without dead ends: 15062 [2021-12-15 09:52:56,411 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 [2021-12-15 09:52:56,412 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 309 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:56,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 133 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:52:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15062 states. [2021-12-15 09:52:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15062 to 13551. [2021-12-15 09:52:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13551 states, 13550 states have (on average 1.0375645756457565) internal successors, (14059), 13550 states have internal predecessors, (14059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13551 states to 13551 states and 14059 transitions. [2021-12-15 09:52:56,535 INFO L78 Accepts]: Start accepts. Automaton has 13551 states and 14059 transitions. Word has length 668 [2021-12-15 09:52:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:56,535 INFO L470 AbstractCegarLoop]: Abstraction has 13551 states and 14059 transitions. [2021-12-15 09:52:56,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13551 states and 14059 transitions. [2021-12-15 09:52:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2021-12-15 09:52:56,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:56,543 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:56,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:52:56,543 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash -694194177, now seen corresponding path program 1 times [2021-12-15 09:52:56,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:56,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125022230] [2021-12-15 09:52:56,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:56,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 566 proven. 190 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 09:52:56,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125022230] [2021-12-15 09:52:56,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125022230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144561961] [2021-12-15 09:52:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:56,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:56,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:56,728 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) [2021-12-15 09:52:56,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:52:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:52:56,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2021-12-15 09:53:00,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:00,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144561961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:00,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:00,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:53:00,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914285277] [2021-12-15 09:53:00,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:00,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:00,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:00,874 INFO L87 Difference]: Start difference. First operand 13551 states and 14059 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:00,905 INFO L93 Difference]: Finished difference Result 13554 states and 14061 transitions. [2021-12-15 09:53:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 675 [2021-12-15 09:53:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:00,917 INFO L225 Difference]: With dead ends: 13554 [2021-12-15 09:53:00,917 INFO L226 Difference]: Without dead ends: 13552 [2021-12-15 09:53:00,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:00,921 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 260 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 760 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:00,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 535 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 760 Unchecked, 0.0s Time] [2021-12-15 09:53:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13552 states. [2021-12-15 09:53:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13552 to 13252. [2021-12-15 09:53:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13251 states have (on average 1.0379593992906195) internal successors, (13754), 13251 states have internal predecessors, (13754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 13754 transitions. [2021-12-15 09:53:01,035 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 13754 transitions. Word has length 675 [2021-12-15 09:53:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:01,036 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 13754 transitions. [2021-12-15 09:53:01,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:01,036 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 13754 transitions. [2021-12-15 09:53:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2021-12-15 09:53:01,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:01,043 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:53:01,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:53:01,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:01,246 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:01,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1257977755, now seen corresponding path program 1 times [2021-12-15 09:53:01,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:01,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248786881] [2021-12-15 09:53:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:01,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-15 09:53:01,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248786881] [2021-12-15 09:53:01,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248786881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:01,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:01,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:53:01,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169187795] [2021-12-15 09:53:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:01,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:01,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:01,412 INFO L87 Difference]: Start difference. First operand 13252 states and 13754 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:02,760 INFO L93 Difference]: Finished difference Result 29803 states and 31008 transitions. [2021-12-15 09:53:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:53:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 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 701 [2021-12-15 09:53:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:02,775 INFO L225 Difference]: With dead ends: 29803 [2021-12-15 09:53:02,775 INFO L226 Difference]: Without dead ends: 16852 [2021-12-15 09:53:02,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:02,782 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 671 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:02,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 440 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:53:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16852 states. [2021-12-15 09:53:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16852 to 15656. [2021-12-15 09:53:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15656 states, 15655 states have (on average 1.0341743851804535) internal successors, (16190), 15655 states have internal predecessors, (16190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15656 states to 15656 states and 16190 transitions. [2021-12-15 09:53:02,901 INFO L78 Accepts]: Start accepts. Automaton has 15656 states and 16190 transitions. Word has length 701 [2021-12-15 09:53:02,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:02,901 INFO L470 AbstractCegarLoop]: Abstraction has 15656 states and 16190 transitions. [2021-12-15 09:53:02,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15656 states and 16190 transitions. [2021-12-15 09:53:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-12-15 09:53:02,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:02,914 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:53:02,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:53:02,914 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:02,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1684815457, now seen corresponding path program 1 times [2021-12-15 09:53:02,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:02,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75089946] [2021-12-15 09:53:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:02,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2021-12-15 09:53:03,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:03,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75089946] [2021-12-15 09:53:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75089946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:03,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:03,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:03,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905967437] [2021-12-15 09:53:03,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:03,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:03,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:03,125 INFO L87 Difference]: Start difference. First operand 15656 states and 16190 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:04,012 INFO L93 Difference]: Finished difference Result 33420 states and 34597 transitions. [2021-12-15 09:53:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 821 [2021-12-15 09:53:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:04,028 INFO L225 Difference]: With dead ends: 33420 [2021-12-15 09:53:04,028 INFO L226 Difference]: Without dead ends: 17766 [2021-12-15 09:53:04,036 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 [2021-12-15 09:53:04,037 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 309 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:04,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 126 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:53:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17766 states. [2021-12-15 09:53:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17766 to 15058. [2021-12-15 09:53:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15058 states, 15057 states have (on average 1.0336056319319917) internal successors, (15563), 15057 states have internal predecessors, (15563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15058 states to 15058 states and 15563 transitions. [2021-12-15 09:53:04,211 INFO L78 Accepts]: Start accepts. Automaton has 15058 states and 15563 transitions. Word has length 821 [2021-12-15 09:53:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:04,211 INFO L470 AbstractCegarLoop]: Abstraction has 15058 states and 15563 transitions. [2021-12-15 09:53:04,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 15058 states and 15563 transitions. [2021-12-15 09:53:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2021-12-15 09:53:04,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:04,225 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:53:04,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:53:04,225 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1338684651, now seen corresponding path program 1 times [2021-12-15 09:53:04,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596681915] [2021-12-15 09:53:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:04,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 772 proven. 41 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-15 09:53:04,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:04,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596681915] [2021-12-15 09:53:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596681915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:04,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766099837] [2021-12-15 09:53:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:04,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:04,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:04,460 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) [2021-12-15 09:53:04,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:53:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:04,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:53:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2021-12-15 09:53:05,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766099837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:05,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:05,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:53:05,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939738521] [2021-12-15 09:53:05,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:05,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:05,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:05,561 INFO L87 Difference]: Start difference. First operand 15058 states and 15563 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:06,434 INFO L93 Difference]: Finished difference Result 35800 states and 37026 transitions. [2021-12-15 09:53:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 828 [2021-12-15 09:53:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:06,455 INFO L225 Difference]: With dead ends: 35800 [2021-12-15 09:53:06,455 INFO L226 Difference]: Without dead ends: 20744 [2021-12-15 09:53:06,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:06,465 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 287 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:06,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 523 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:53:06,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20744 states. [2021-12-15 09:53:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20744 to 18648. [2021-12-15 09:53:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18648 states, 18647 states have (on average 1.0310505711374485) internal successors, (19226), 18647 states have internal predecessors, (19226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18648 states to 18648 states and 19226 transitions. [2021-12-15 09:53:06,638 INFO L78 Accepts]: Start accepts. Automaton has 18648 states and 19226 transitions. Word has length 828 [2021-12-15 09:53:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:06,638 INFO L470 AbstractCegarLoop]: Abstraction has 18648 states and 19226 transitions. [2021-12-15 09:53:06,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 18648 states and 19226 transitions. [2021-12-15 09:53:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2021-12-15 09:53:06,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:06,653 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:53:06,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:53:06,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:06,854 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash -712309912, now seen corresponding path program 1 times [2021-12-15 09:53:06,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:06,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503014884] [2021-12-15 09:53:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:06,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 745 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-12-15 09:53:07,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:07,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503014884] [2021-12-15 09:53:07,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503014884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:07,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:07,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:07,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493644638] [2021-12-15 09:53:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:07,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:07,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:07,054 INFO L87 Difference]: Start difference. First operand 18648 states and 19226 transitions. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:07,903 INFO L93 Difference]: Finished difference Result 40280 states and 41569 transitions. [2021-12-15 09:53:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:07,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 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 857 [2021-12-15 09:53:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:07,924 INFO L225 Difference]: With dead ends: 40280 [2021-12-15 09:53:07,924 INFO L226 Difference]: Without dead ends: 21933 [2021-12-15 09:53:07,936 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 [2021-12-15 09:53:07,937 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 92 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:07,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 170 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:53:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21933 states. [2021-12-15 09:53:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21933 to 20436. [2021-12-15 09:53:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20436 states, 20435 states have (on average 1.028823097626621) internal successors, (21024), 20435 states have internal predecessors, (21024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20436 states to 20436 states and 21024 transitions. [2021-12-15 09:53:08,178 INFO L78 Accepts]: Start accepts. Automaton has 20436 states and 21024 transitions. Word has length 857 [2021-12-15 09:53:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:08,179 INFO L470 AbstractCegarLoop]: Abstraction has 20436 states and 21024 transitions. [2021-12-15 09:53:08,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 20436 states and 21024 transitions. [2021-12-15 09:53:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2021-12-15 09:53:08,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:08,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:08,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:53:08,198 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 579730196, now seen corresponding path program 1 times [2021-12-15 09:53:08,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:08,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770955435] [2021-12-15 09:53:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:08,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 753 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-15 09:53:08,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770955435] [2021-12-15 09:53:08,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770955435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:08,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:08,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:53:08,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503468530] [2021-12-15 09:53:08,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:08,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:08,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:08,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:08,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:08,449 INFO L87 Difference]: Start difference. First operand 20436 states and 21024 transitions. Second operand has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:09,688 INFO L93 Difference]: Finished difference Result 44762 states and 46102 transitions. [2021-12-15 09:53:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:53:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 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 910 [2021-12-15 09:53:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:09,714 INFO L225 Difference]: With dead ends: 44762 [2021-12-15 09:53:09,714 INFO L226 Difference]: Without dead ends: 24627 [2021-12-15 09:53:09,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:09,728 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 515 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:09,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 134 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:53:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24627 states. [2021-12-15 09:53:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24627 to 23428. [2021-12-15 09:53:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23428 states, 23427 states have (on average 1.0289836513424682) internal successors, (24106), 23427 states have internal predecessors, (24106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23428 states to 23428 states and 24106 transitions. [2021-12-15 09:53:09,911 INFO L78 Accepts]: Start accepts. Automaton has 23428 states and 24106 transitions. Word has length 910 [2021-12-15 09:53:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:09,912 INFO L470 AbstractCegarLoop]: Abstraction has 23428 states and 24106 transitions. [2021-12-15 09:53:09,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 23428 states and 24106 transitions. [2021-12-15 09:53:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2021-12-15 09:53:09,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:09,930 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:09,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 09:53:09,930 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 548599927, now seen corresponding path program 1 times [2021-12-15 09:53:09,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:09,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904253445] [2021-12-15 09:53:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:09,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-12-15 09:53:10,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:10,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904253445] [2021-12-15 09:53:10,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904253445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:10,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:10,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:10,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838379992] [2021-12-15 09:53:10,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:10,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:10,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:10,147 INFO L87 Difference]: Start difference. First operand 23428 states and 24106 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:10,958 INFO L93 Difference]: Finished difference Result 49542 states and 51012 transitions. [2021-12-15 09:53:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:10,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 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 915 [2021-12-15 09:53:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:10,983 INFO L225 Difference]: With dead ends: 49542 [2021-12-15 09:53:10,983 INFO L226 Difference]: Without dead ends: 26415 [2021-12-15 09:53:10,997 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 [2021-12-15 09:53:10,997 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 307 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:10,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 516 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:53:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-12-15 09:53:11,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 21028. [2021-12-15 09:53:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21028 states, 21027 states have (on average 1.0259666143529746) internal successors, (21573), 21027 states have internal predecessors, (21573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21028 states to 21028 states and 21573 transitions. [2021-12-15 09:53:11,181 INFO L78 Accepts]: Start accepts. Automaton has 21028 states and 21573 transitions. Word has length 915 [2021-12-15 09:53:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:11,181 INFO L470 AbstractCegarLoop]: Abstraction has 21028 states and 21573 transitions. [2021-12-15 09:53:11,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21028 states and 21573 transitions. [2021-12-15 09:53:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2021-12-15 09:53:11,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:11,200 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:11,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 09:53:11,201 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1414559480, now seen corresponding path program 1 times [2021-12-15 09:53:11,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:11,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118699571] [2021-12-15 09:53:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:11,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 1459 proven. 26 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-15 09:53:11,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:11,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118699571] [2021-12-15 09:53:11,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118699571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51433389] [2021-12-15 09:53:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:11,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:11,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:11,567 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) [2021-12-15 09:53:11,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:53:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:11,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:53:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 964 proven. 0 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-12-15 09:53:16,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:16,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51433389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:16,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:16,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-15 09:53:16,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509967340] [2021-12-15 09:53:16,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:16,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:16,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:53:16,646 INFO L87 Difference]: Start difference. First operand 21028 states and 21573 transitions. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:16,699 INFO L93 Difference]: Finished difference Result 21514 states and 22066 transitions. [2021-12-15 09:53:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:53:16,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 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 1077 [2021-12-15 09:53:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:16,718 INFO L225 Difference]: With dead ends: 21514 [2021-12-15 09:53:16,718 INFO L226 Difference]: Without dead ends: 21512 [2021-12-15 09:53:16,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:53:16,724 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1125 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:16,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 578 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1125 Unchecked, 0.0s Time] [2021-12-15 09:53:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21512 states. [2021-12-15 09:53:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21512 to 21311. [2021-12-15 09:53:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 21310 states have (on average 1.025809479117785) internal successors, (21860), 21310 states have internal predecessors, (21860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 21860 transitions. [2021-12-15 09:53:16,920 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 21860 transitions. Word has length 1077 [2021-12-15 09:53:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:16,921 INFO L470 AbstractCegarLoop]: Abstraction has 21311 states and 21860 transitions. [2021-12-15 09:53:16,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 21860 transitions. [2021-12-15 09:53:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1080 [2021-12-15 09:53:16,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:16,941 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:16,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:53:17,159 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,SelfDestructingSolverStorable23 [2021-12-15 09:53:17,159 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash -401608452, now seen corresponding path program 1 times [2021-12-15 09:53:17,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:17,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171811334] [2021-12-15 09:53:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:17,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 1222 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-12-15 09:53:17,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:17,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171811334] [2021-12-15 09:53:17,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171811334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:17,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:17,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:53:17,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713987306] [2021-12-15 09:53:17,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:17,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:17,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:17,430 INFO L87 Difference]: Start difference. First operand 21311 states and 21860 transitions. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)