./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.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 f29c97960939e53f55e46ebed0dba8de02c44a30d845c26a8268aafa8af6f244 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:48:12,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:48:12,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:48:12,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:48:12,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:48:12,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:48:12,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:48:12,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:48:12,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:48:12,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:48:12,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:48:12,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:48:12,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:48:12,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:48:12,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:48:12,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:48:12,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:48:12,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:48:12,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:48:12,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:48:12,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:48:12,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:48:12,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:48:12,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:48:12,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:48:12,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:48:12,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:48:12,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:48:12,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:48:12,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:48:12,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:48:12,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:48:12,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:48:12,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:48:12,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:48:12,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:48:12,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:48:12,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:48:12,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:48:12,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:48:12,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:48:12,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:48:12,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:48:12,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:48:12,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:48:12,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:48:12,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:48:12,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:48:12,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:48:12,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:48:12,211 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:48:12,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:48:12,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:48:12,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:48:12,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:48:12,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:48:12,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:48:12,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:48:12,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:48:12,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:48:12,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:48:12,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:48:12,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:48:12,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:48:12,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:48:12,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:48:12,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:48:12,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:48:12,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:48:12,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:48:12,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:48:12,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:48:12,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:48:12,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:48:12,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:48:12,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:48:12,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f29c97960939e53f55e46ebed0dba8de02c44a30d845c26a8268aafa8af6f244 [2021-12-22 11:48:12,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:48:12,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:48:12,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:48:12,435 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:48:12,435 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:48:12,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2021-12-22 11:48:12,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802df25d7/3aeb8b2b0e8d45118b139d55c2d74e9b/FLAG13681387a [2021-12-22 11:48:12,872 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:48:12,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2021-12-22 11:48:12,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802df25d7/3aeb8b2b0e8d45118b139d55c2d74e9b/FLAG13681387a [2021-12-22 11:48:13,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802df25d7/3aeb8b2b0e8d45118b139d55c2d74e9b [2021-12-22 11:48:13,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:48:13,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:48:13,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:48:13,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:48:13,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:48:13,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b58dafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13, skipping insertion in model container [2021-12-22 11:48:13,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:48:13,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:48:13,466 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/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c[12968,12981] [2021-12-22 11:48:13,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:48:13,488 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:48:13,540 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/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c[12968,12981] [2021-12-22 11:48:13,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:48:13,553 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:48:13,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13 WrapperNode [2021-12-22 11:48:13,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:48:13,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:48:13,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:48:13,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:48:13,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,614 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 443 [2021-12-22 11:48:13,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:48:13,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:48:13,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:48:13,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:48:13,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:48:13,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:48:13,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:48:13,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:48:13,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (1/1) ... [2021-12-22 11:48:13,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:48:13,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:48:13,686 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) [2021-12-22 11:48:13,699 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 [2021-12-22 11:48:13,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:48:13,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:48:13,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:48:13,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:48:13,830 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:48:13,832 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:48:14,247 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:48:14,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:48:14,255 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:48:14,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:14 BoogieIcfgContainer [2021-12-22 11:48:14,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:48:14,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:48:14,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:48:14,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:48:14,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:13" (1/3) ... [2021-12-22 11:48:14,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b44bf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:14, skipping insertion in model container [2021-12-22 11:48:14,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:13" (2/3) ... [2021-12-22 11:48:14,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b44bf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:14, skipping insertion in model container [2021-12-22 11:48:14,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:14" (3/3) ... [2021-12-22 11:48:14,265 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2021-12-22 11:48:14,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:48:14,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:48:14,313 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:48:14,318 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 [2021-12-22 11:48:14,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:48:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:48:14,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:14,350 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] [2021-12-22 11:48:14,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2021-12-22 11:48:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784152820] [2021-12-22 11:48:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:14,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:14,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784152820] [2021-12-22 11:48:14,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784152820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:14,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:14,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:48:14,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14418056] [2021-12-22 11:48:14,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:14,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:48:14,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:14,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:48:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:48:14,528 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:14,556 INFO L93 Difference]: Finished difference Result 214 states and 367 transitions. [2021-12-22 11:48:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:48:14,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-22 11:48:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:14,567 INFO L225 Difference]: With dead ends: 214 [2021-12-22 11:48:14,568 INFO L226 Difference]: Without dead ends: 133 [2021-12-22 11:48:14,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:48:14,577 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:14,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-22 11:48:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-22 11:48:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2021-12-22 11:48:14,620 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2021-12-22 11:48:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:14,621 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2021-12-22 11:48:14,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2021-12-22 11:48:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:48:14,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:14,623 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] [2021-12-22 11:48:14,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:48:14,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2021-12-22 11:48:14,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:14,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443115269] [2021-12-22 11:48:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:14,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:14,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443115269] [2021-12-22 11:48:14,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443115269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:14,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:14,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:14,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511470277] [2021-12-22 11:48:14,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:14,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:14,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:14,751 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:14,823 INFO L93 Difference]: Finished difference Result 213 states and 360 transitions. [2021-12-22 11:48:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-22 11:48:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:14,826 INFO L225 Difference]: With dead ends: 213 [2021-12-22 11:48:14,826 INFO L226 Difference]: Without dead ends: 133 [2021-12-22 11:48:14,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:48:14,831 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 3 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:14,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 878 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-22 11:48:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-22 11:48:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.5303030303030303) internal successors, (202), 132 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2021-12-22 11:48:14,841 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 37 [2021-12-22 11:48:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:14,841 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2021-12-22 11:48:14,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2021-12-22 11:48:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 11:48:14,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:14,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:14,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:48:14,846 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2021-12-22 11:48:14,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:14,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126881370] [2021-12-22 11:48:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:14,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:14,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:14,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126881370] [2021-12-22 11:48:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126881370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:14,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:14,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:14,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564614325] [2021-12-22 11:48:14,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:14,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:14,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:14,929 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:14,958 INFO L93 Difference]: Finished difference Result 270 states and 429 transitions. [2021-12-22 11:48:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:14,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-22 11:48:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:14,967 INFO L225 Difference]: With dead ends: 270 [2021-12-22 11:48:14,968 INFO L226 Difference]: Without dead ends: 194 [2021-12-22 11:48:14,968 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 [2021-12-22 11:48:14,973 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:14,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 345 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-22 11:48:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-12-22 11:48:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5473684210526315) internal successors, (294), 190 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 294 transitions. [2021-12-22 11:48:14,991 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 294 transitions. Word has length 63 [2021-12-22 11:48:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:14,992 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 294 transitions. [2021-12-22 11:48:14,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 294 transitions. [2021-12-22 11:48:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 11:48:14,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:14,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:14,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:48:14,997 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2021-12-22 11:48:14,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:14,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585310863] [2021-12-22 11:48:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:14,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:15,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585310863] [2021-12-22 11:48:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585310863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:15,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:15,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:15,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838296962] [2021-12-22 11:48:15,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:15,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:15,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:15,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:15,089 INFO L87 Difference]: Start difference. First operand 191 states and 294 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:15,117 INFO L93 Difference]: Finished difference Result 445 states and 706 transitions. [2021-12-22 11:48:15,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:15,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-22 11:48:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:15,122 INFO L225 Difference]: With dead ends: 445 [2021-12-22 11:48:15,122 INFO L226 Difference]: Without dead ends: 311 [2021-12-22 11:48:15,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:15,126 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:15,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 368 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-22 11:48:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2021-12-22 11:48:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.5686274509803921) internal successors, (480), 306 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 480 transitions. [2021-12-22 11:48:15,146 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 480 transitions. Word has length 65 [2021-12-22 11:48:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:15,147 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 480 transitions. [2021-12-22 11:48:15,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 480 transitions. [2021-12-22 11:48:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:48:15,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:15,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:15,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:48:15,150 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:15,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2021-12-22 11:48:15,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:15,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361263403] [2021-12-22 11:48:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:15,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:15,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:15,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361263403] [2021-12-22 11:48:15,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361263403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:15,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:15,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725179898] [2021-12-22 11:48:15,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:15,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:15,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:15,211 INFO L87 Difference]: Start difference. First operand 307 states and 480 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:15,247 INFO L93 Difference]: Finished difference Result 779 states and 1238 transitions. [2021-12-22 11:48:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-22 11:48:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:15,249 INFO L225 Difference]: With dead ends: 779 [2021-12-22 11:48:15,249 INFO L226 Difference]: Without dead ends: 529 [2021-12-22 11:48:15,250 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 [2021-12-22 11:48:15,251 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:15,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 369 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-12-22 11:48:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 523. [2021-12-22 11:48:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.5708812260536398) internal successors, (820), 522 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 820 transitions. [2021-12-22 11:48:15,275 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 820 transitions. Word has length 67 [2021-12-22 11:48:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:15,275 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 820 transitions. [2021-12-22 11:48:15,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 820 transitions. [2021-12-22 11:48:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 11:48:15,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:15,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:15,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:48:15,277 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2021-12-22 11:48:15,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:15,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753059573] [2021-12-22 11:48:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:15,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:15,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753059573] [2021-12-22 11:48:15,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753059573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:15,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:15,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:15,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481142425] [2021-12-22 11:48:15,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:15,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:15,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:15,341 INFO L87 Difference]: Start difference. First operand 523 states and 820 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:15,461 INFO L93 Difference]: Finished difference Result 2639 states and 4230 transitions. [2021-12-22 11:48:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:48:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 11:48:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:15,468 INFO L225 Difference]: With dead ends: 2639 [2021-12-22 11:48:15,468 INFO L226 Difference]: Without dead ends: 2173 [2021-12-22 11:48:15,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:48:15,470 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 861 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:15,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1129 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:48:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-12-22 11:48:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 971. [2021-12-22 11:48:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.579381443298969) internal successors, (1532), 970 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1532 transitions. [2021-12-22 11:48:15,534 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1532 transitions. Word has length 69 [2021-12-22 11:48:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1532 transitions. [2021-12-22 11:48:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1532 transitions. [2021-12-22 11:48:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 11:48:15,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:15,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:15,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:48:15,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2021-12-22 11:48:15,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:15,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952274373] [2021-12-22 11:48:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:15,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:15,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:15,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952274373] [2021-12-22 11:48:15,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952274373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:15,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:15,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:48:15,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668512526] [2021-12-22 11:48:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:15,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:48:15,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:48:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:15,578 INFO L87 Difference]: Start difference. First operand 971 states and 1532 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:15,671 INFO L93 Difference]: Finished difference Result 3521 states and 5605 transitions. [2021-12-22 11:48:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:48:15,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-12-22 11:48:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:15,679 INFO L225 Difference]: With dead ends: 3521 [2021-12-22 11:48:15,679 INFO L226 Difference]: Without dead ends: 2607 [2021-12-22 11:48:15,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:15,681 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 365 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:15,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 660 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-12-22 11:48:15,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1780. [2021-12-22 11:48:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.5801011804384486) internal successors, (2811), 1779 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2811 transitions. [2021-12-22 11:48:15,747 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2811 transitions. Word has length 70 [2021-12-22 11:48:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:15,747 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 2811 transitions. [2021-12-22 11:48:15,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2811 transitions. [2021-12-22 11:48:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 11:48:15,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:15,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:15,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:48:15,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2021-12-22 11:48:15,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:15,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736427814] [2021-12-22 11:48:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:15,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:15,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736427814] [2021-12-22 11:48:15,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736427814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:15,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:15,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:48:15,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838282329] [2021-12-22 11:48:15,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:15,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:48:15,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:48:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:15,803 INFO L87 Difference]: Start difference. First operand 1780 states and 2811 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:15,940 INFO L93 Difference]: Finished difference Result 5229 states and 8331 transitions. [2021-12-22 11:48:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:48:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-22 11:48:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:15,950 INFO L225 Difference]: With dead ends: 5229 [2021-12-22 11:48:15,950 INFO L226 Difference]: Without dead ends: 3506 [2021-12-22 11:48:15,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:15,953 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 363 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:15,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-12-22 11:48:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 2627. [2021-12-22 11:48:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 1.578827113480579) internal successors, (4146), 2626 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 4146 transitions. [2021-12-22 11:48:16,051 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 4146 transitions. Word has length 71 [2021-12-22 11:48:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:16,052 INFO L470 AbstractCegarLoop]: Abstraction has 2627 states and 4146 transitions. [2021-12-22 11:48:16,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 4146 transitions. [2021-12-22 11:48:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:48:16,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:16,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:16,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:48:16,063 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2021-12-22 11:48:16,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:16,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913906033] [2021-12-22 11:48:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:16,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:16,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913906033] [2021-12-22 11:48:16,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913906033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:16,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:16,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:16,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786455157] [2021-12-22 11:48:16,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:16,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:16,105 INFO L87 Difference]: Start difference. First operand 2627 states and 4146 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:16,204 INFO L93 Difference]: Finished difference Result 5332 states and 8434 transitions. [2021-12-22 11:48:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:16,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 11:48:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:16,214 INFO L225 Difference]: With dead ends: 5332 [2021-12-22 11:48:16,214 INFO L226 Difference]: Without dead ends: 3834 [2021-12-22 11:48:16,215 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 [2021-12-22 11:48:16,216 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 96 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:16,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-12-22 11:48:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2021-12-22 11:48:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 1.565126598799269) internal successors, (5996), 3831 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5996 transitions. [2021-12-22 11:48:16,336 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5996 transitions. Word has length 72 [2021-12-22 11:48:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:16,336 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 5996 transitions. [2021-12-22 11:48:16,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5996 transitions. [2021-12-22 11:48:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:48:16,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:16,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:16,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:48:16,338 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2021-12-22 11:48:16,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:16,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789932185] [2021-12-22 11:48:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:16,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:16,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789932185] [2021-12-22 11:48:16,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789932185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:16,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:16,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:48:16,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208334776] [2021-12-22 11:48:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:16,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:48:16,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:48:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:16,372 INFO L87 Difference]: Start difference. First operand 3832 states and 5996 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:16,627 INFO L93 Difference]: Finished difference Result 11784 states and 18557 transitions. [2021-12-22 11:48:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:48:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 11:48:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:16,649 INFO L225 Difference]: With dead ends: 11784 [2021-12-22 11:48:16,649 INFO L226 Difference]: Without dead ends: 8140 [2021-12-22 11:48:16,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:16,654 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 361 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:16,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8140 states. [2021-12-22 11:48:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8140 to 5964. [2021-12-22 11:48:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 1.5609592487003185) internal successors, (9308), 5963 states have internal predecessors, (9308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 9308 transitions. [2021-12-22 11:48:16,878 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 9308 transitions. Word has length 72 [2021-12-22 11:48:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:16,879 INFO L470 AbstractCegarLoop]: Abstraction has 5964 states and 9308 transitions. [2021-12-22 11:48:16,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 9308 transitions. [2021-12-22 11:48:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:48:16,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:16,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:16,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:48:16,881 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2021-12-22 11:48:16,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:16,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228868347] [2021-12-22 11:48:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:16,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:16,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228868347] [2021-12-22 11:48:16,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228868347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:16,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:16,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:16,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385849244] [2021-12-22 11:48:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:16,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:16,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:16,923 INFO L87 Difference]: Start difference. First operand 5964 states and 9308 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:17,194 INFO L93 Difference]: Finished difference Result 13002 states and 20346 transitions. [2021-12-22 11:48:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:17,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 11:48:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:17,227 INFO L225 Difference]: With dead ends: 13002 [2021-12-22 11:48:17,228 INFO L226 Difference]: Without dead ends: 8809 [2021-12-22 11:48:17,233 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 [2021-12-22 11:48:17,234 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 102 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:17,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8809 states. [2021-12-22 11:48:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8809 to 8807. [2021-12-22 11:48:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 1.5470133999545763) internal successors, (13623), 8806 states have internal predecessors, (13623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 13623 transitions. [2021-12-22 11:48:17,586 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 13623 transitions. Word has length 72 [2021-12-22 11:48:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:17,586 INFO L470 AbstractCegarLoop]: Abstraction has 8807 states and 13623 transitions. [2021-12-22 11:48:17,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 13623 transitions. [2021-12-22 11:48:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:48:17,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:17,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:17,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:48:17,589 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash 952039085, now seen corresponding path program 1 times [2021-12-22 11:48:17,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:17,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269041564] [2021-12-22 11:48:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:17,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:17,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269041564] [2021-12-22 11:48:17,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269041564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:17,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:17,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:17,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866509363] [2021-12-22 11:48:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:17,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:17,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:17,619 INFO L87 Difference]: Start difference. First operand 8807 states and 13623 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:17,942 INFO L93 Difference]: Finished difference Result 21113 states and 32828 transitions. [2021-12-22 11:48:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 11:48:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:17,964 INFO L225 Difference]: With dead ends: 21113 [2021-12-22 11:48:17,964 INFO L226 Difference]: Without dead ends: 12385 [2021-12-22 11:48:17,974 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 [2021-12-22 11:48:17,974 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 108 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:17,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 464 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12385 states. [2021-12-22 11:48:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12385 to 12383. [2021-12-22 11:48:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12383 states, 12382 states have (on average 1.5520917460830237) internal successors, (19218), 12382 states have internal predecessors, (19218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12383 states to 12383 states and 19218 transitions. [2021-12-22 11:48:18,432 INFO L78 Accepts]: Start accepts. Automaton has 12383 states and 19218 transitions. Word has length 72 [2021-12-22 11:48:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:18,432 INFO L470 AbstractCegarLoop]: Abstraction has 12383 states and 19218 transitions. [2021-12-22 11:48:18,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 12383 states and 19218 transitions. [2021-12-22 11:48:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 11:48:18,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:18,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:18,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:48:18,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2021-12-22 11:48:18,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:18,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131954892] [2021-12-22 11:48:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:18,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:18,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131954892] [2021-12-22 11:48:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131954892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:18,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481581373] [2021-12-22 11:48:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:18,516 INFO L87 Difference]: Start difference. First operand 12383 states and 19218 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:19,026 INFO L93 Difference]: Finished difference Result 24689 states and 38332 transitions. [2021-12-22 11:48:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-22 11:48:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:19,049 INFO L225 Difference]: With dead ends: 24689 [2021-12-22 11:48:19,049 INFO L226 Difference]: Without dead ends: 12385 [2021-12-22 11:48:19,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:48:19,065 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 362 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:19,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 544 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12385 states. [2021-12-22 11:48:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12385 to 12383. [2021-12-22 11:48:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12383 states, 12382 states have (on average 1.5399773865288322) internal successors, (19068), 12382 states have internal predecessors, (19068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12383 states to 12383 states and 19068 transitions. [2021-12-22 11:48:19,417 INFO L78 Accepts]: Start accepts. Automaton has 12383 states and 19068 transitions. Word has length 74 [2021-12-22 11:48:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:19,417 INFO L470 AbstractCegarLoop]: Abstraction has 12383 states and 19068 transitions. [2021-12-22 11:48:19,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 12383 states and 19068 transitions. [2021-12-22 11:48:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 11:48:19,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:19,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:19,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:48:19,419 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:19,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1698241801, now seen corresponding path program 1 times [2021-12-22 11:48:19,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:19,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713609109] [2021-12-22 11:48:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:19,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:19,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:19,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713609109] [2021-12-22 11:48:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713609109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:19,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:19,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:19,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556293614] [2021-12-22 11:48:19,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:19,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:19,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:19,519 INFO L87 Difference]: Start difference. First operand 12383 states and 19068 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:20,150 INFO L93 Difference]: Finished difference Result 35726 states and 55162 transitions. [2021-12-22 11:48:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-22 11:48:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:20,191 INFO L225 Difference]: With dead ends: 35726 [2021-12-22 11:48:20,192 INFO L226 Difference]: Without dead ends: 23422 [2021-12-22 11:48:20,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:48:20,203 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 261 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:20,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 546 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23422 states. [2021-12-22 11:48:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23422 to 23420. [2021-12-22 11:48:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23420 states, 23419 states have (on average 1.5279900935138135) internal successors, (35784), 23419 states have internal predecessors, (35784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23420 states to 23420 states and 35784 transitions. [2021-12-22 11:48:21,038 INFO L78 Accepts]: Start accepts. Automaton has 23420 states and 35784 transitions. Word has length 77 [2021-12-22 11:48:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:21,039 INFO L470 AbstractCegarLoop]: Abstraction has 23420 states and 35784 transitions. [2021-12-22 11:48:21,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 23420 states and 35784 transitions. [2021-12-22 11:48:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 11:48:21,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:21,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:21,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:48:21,040 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash 677312633, now seen corresponding path program 1 times [2021-12-22 11:48:21,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:21,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328785434] [2021-12-22 11:48:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:21,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:21,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328785434] [2021-12-22 11:48:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328785434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:21,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:21,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:48:21,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651083547] [2021-12-22 11:48:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:21,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:48:21,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:48:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:48:21,117 INFO L87 Difference]: Start difference. First operand 23420 states and 35784 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:22,689 INFO L93 Difference]: Finished difference Result 47517 states and 71955 transitions. [2021-12-22 11:48:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:48:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-22 11:48:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:22,777 INFO L225 Difference]: With dead ends: 47517 [2021-12-22 11:48:22,777 INFO L226 Difference]: Without dead ends: 47515 [2021-12-22 11:48:22,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:48:22,786 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 917 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:22,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 1064 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47515 states. [2021-12-22 11:48:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47515 to 24581. [2021-12-22 11:48:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24581 states, 24580 states have (on average 1.5026851098454028) internal successors, (36936), 24580 states have internal predecessors, (36936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24581 states to 24581 states and 36936 transitions. [2021-12-22 11:48:23,896 INFO L78 Accepts]: Start accepts. Automaton has 24581 states and 36936 transitions. Word has length 78 [2021-12-22 11:48:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:23,896 INFO L470 AbstractCegarLoop]: Abstraction has 24581 states and 36936 transitions. [2021-12-22 11:48:23,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 24581 states and 36936 transitions. [2021-12-22 11:48:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 11:48:23,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:23,903 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:48:23,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:48:23,904 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash -931565963, now seen corresponding path program 1 times [2021-12-22 11:48:23,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:23,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479501497] [2021-12-22 11:48:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:23,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 11:48:23,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:23,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479501497] [2021-12-22 11:48:23,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479501497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:23,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:23,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:23,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880415983] [2021-12-22 11:48:23,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:23,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:23,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:23,965 INFO L87 Difference]: Start difference. First operand 24581 states and 36936 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:25,776 INFO L93 Difference]: Finished difference Result 61381 states and 92529 transitions. [2021-12-22 11:48:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:25,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 105 [2021-12-22 11:48:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:25,866 INFO L225 Difference]: With dead ends: 61381 [2021-12-22 11:48:25,866 INFO L226 Difference]: Without dead ends: 50043 [2021-12-22 11:48:25,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:48:25,890 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 460 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:25,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 902 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50043 states. [2021-12-22 11:48:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50043 to 38581. [2021-12-22 11:48:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38581 states, 38580 states have (on average 1.4995075168481078) internal successors, (57851), 38580 states have internal predecessors, (57851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38581 states to 38581 states and 57851 transitions. [2021-12-22 11:48:27,613 INFO L78 Accepts]: Start accepts. Automaton has 38581 states and 57851 transitions. Word has length 105 [2021-12-22 11:48:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:27,614 INFO L470 AbstractCegarLoop]: Abstraction has 38581 states and 57851 transitions. [2021-12-22 11:48:27,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:27,614 INFO L276 IsEmpty]: Start isEmpty. Operand 38581 states and 57851 transitions. [2021-12-22 11:48:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 11:48:27,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:27,616 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:48:27,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:48:27,616 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2025931908, now seen corresponding path program 1 times [2021-12-22 11:48:27,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765818434] [2021-12-22 11:48:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:27,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 11:48:27,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765818434] [2021-12-22 11:48:27,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765818434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:27,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:27,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:27,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069294267] [2021-12-22 11:48:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:27,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:27,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:27,666 INFO L87 Difference]: Start difference. First operand 38581 states and 57851 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:29,803 INFO L93 Difference]: Finished difference Result 65925 states and 99425 transitions. [2021-12-22 11:48:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:29,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 105 [2021-12-22 11:48:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:29,930 INFO L225 Difference]: With dead ends: 65925 [2021-12-22 11:48:29,931 INFO L226 Difference]: Without dead ends: 54587 [2021-12-22 11:48:29,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:48:29,966 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 454 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:29,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 966 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:48:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54587 states. [2021-12-22 11:48:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54587 to 52301. [2021-12-22 11:48:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52301 states, 52300 states have (on average 1.5009751434034417) internal successors, (78501), 52300 states have internal predecessors, (78501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52301 states to 52301 states and 78501 transitions. [2021-12-22 11:48:32,279 INFO L78 Accepts]: Start accepts. Automaton has 52301 states and 78501 transitions. Word has length 105 [2021-12-22 11:48:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:32,280 INFO L470 AbstractCegarLoop]: Abstraction has 52301 states and 78501 transitions. [2021-12-22 11:48:32,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 52301 states and 78501 transitions. [2021-12-22 11:48:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 11:48:32,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:32,282 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:48:32,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:48:32,282 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 651039571, now seen corresponding path program 1 times [2021-12-22 11:48:32,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436951658] [2021-12-22 11:48:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:32,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:48:32,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:32,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436951658] [2021-12-22 11:48:32,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436951658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:32,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:32,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:32,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792545743] [2021-12-22 11:48:32,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:32,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:32,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:32,340 INFO L87 Difference]: Start difference. First operand 52301 states and 78501 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:34,916 INFO L93 Difference]: Finished difference Result 77875 states and 117412 transitions. [2021-12-22 11:48:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:34,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 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 105 [2021-12-22 11:48:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:35,012 INFO L225 Difference]: With dead ends: 77875 [2021-12-22 11:48:35,013 INFO L226 Difference]: Without dead ends: 63683 [2021-12-22 11:48:35,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:48:35,032 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 464 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:35,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 856 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63683 states. [2021-12-22 11:48:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63683 to 61397. [2021-12-22 11:48:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61397 states, 61396 states have (on average 1.5026223206723566) internal successors, (92255), 61396 states have internal predecessors, (92255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61397 states to 61397 states and 92255 transitions. [2021-12-22 11:48:37,771 INFO L78 Accepts]: Start accepts. Automaton has 61397 states and 92255 transitions. Word has length 105 [2021-12-22 11:48:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:37,771 INFO L470 AbstractCegarLoop]: Abstraction has 61397 states and 92255 transitions. [2021-12-22 11:48:37,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 61397 states and 92255 transitions. [2021-12-22 11:48:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-22 11:48:37,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:37,774 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:48:37,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 11:48:37,774 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1079524893, now seen corresponding path program 1 times [2021-12-22 11:48:37,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:37,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597363960] [2021-12-22 11:48:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:37,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:48:37,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:37,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597363960] [2021-12-22 11:48:37,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597363960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:37,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:37,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:48:37,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786343971] [2021-12-22 11:48:37,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:37,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:48:37,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:48:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:37,827 INFO L87 Difference]: Start difference. First operand 61397 states and 92255 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:41,202 INFO L93 Difference]: Finished difference Result 105556 states and 159143 transitions. [2021-12-22 11:48:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:48:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 106 [2021-12-22 11:48:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:41,328 INFO L225 Difference]: With dead ends: 105556 [2021-12-22 11:48:41,328 INFO L226 Difference]: Without dead ends: 82268 [2021-12-22 11:48:41,367 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 [2021-12-22 11:48:41,368 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 195 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:41,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 685 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82268 states. [2021-12-22 11:48:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82268 to 79984. [2021-12-22 11:48:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79984 states, 79983 states have (on average 1.5002312991510696) internal successors, (119993), 79983 states have internal predecessors, (119993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79984 states to 79984 states and 119993 transitions. [2021-12-22 11:48:45,166 INFO L78 Accepts]: Start accepts. Automaton has 79984 states and 119993 transitions. Word has length 106 [2021-12-22 11:48:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:45,166 INFO L470 AbstractCegarLoop]: Abstraction has 79984 states and 119993 transitions. [2021-12-22 11:48:45,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 79984 states and 119993 transitions. [2021-12-22 11:48:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-22 11:48:45,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:45,169 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:48:45,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 11:48:45,169 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1502226719, now seen corresponding path program 1 times [2021-12-22 11:48:45,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:45,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36355245] [2021-12-22 11:48:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:45,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:48:45,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:45,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36355245] [2021-12-22 11:48:45,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36355245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:45,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:45,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:45,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929657389] [2021-12-22 11:48:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:45,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:45,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:45,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:45,223 INFO L87 Difference]: Start difference. First operand 79984 states and 119993 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)