./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/product-lines/elevator_spec3_product18.cil.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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 14:42:30,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:42:30,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:42:30,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:42:30,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:42:30,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:42:30,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:42:30,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:42:30,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:42:30,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:42:30,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:42:30,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:42:30,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:42:30,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:42:30,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:42:30,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:42:30,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:42:30,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:42:30,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:42:30,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:42:30,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:42:30,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:42:30,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:42:30,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:42:30,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:42:30,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:42:30,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:42:30,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:42:30,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:42:30,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:42:30,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:42:30,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:42:30,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:42:30,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:42:30,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:42:30,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:42:30,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:42:30,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:42:30,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:42:30,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:42:30,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:42:30,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:42:30,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:42:30,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:42:30,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:42:30,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:42:30,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:42:30,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:42:30,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:42:30,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:42:30,322 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:42:30,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:42:30,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:42:30,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:42:30,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:42:30,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:42:30,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:42:30,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:42:30,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:42:30,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:42:30,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:42:30,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:42:30,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:42:30,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:42:30,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:42:30,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:42:30,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:42:30,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:42:30,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:42:30,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:42:30,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:42:30,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:42:30,329 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:42:30,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:42:30,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:42:30,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:42:30,330 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2021-12-17 14:42:30,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:42:30,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:42:30,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:42:30,566 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:42:30,570 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:42:30,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-12-17 14:42:30,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee2f9238/81c087aa340d4395ba427efa0664d6c2/FLAGc02602225 [2021-12-17 14:42:31,089 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:42:31,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-12-17 14:42:31,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee2f9238/81c087aa340d4395ba427efa0664d6c2/FLAGc02602225 [2021-12-17 14:42:31,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee2f9238/81c087aa340d4395ba427efa0664d6c2 [2021-12-17 14:42:31,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:42:31,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:42:31,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:42:31,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:42:31,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:42:31,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:42:31" (1/1) ... [2021-12-17 14:42:31,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606718bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:31, skipping insertion in model container [2021-12-17 14:42:31,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:42:31" (1/1) ... [2021-12-17 14:42:31,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:42:31,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:42:31,946 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/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-12-17 14:42:32,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:42:32,067 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:42:32,098 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/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-12-17 14:42:32,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:42:32,138 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:42:32,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32 WrapperNode [2021-12-17 14:42:32,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:42:32,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:42:32,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:42:32,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:42:32,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,204 INFO L137 Inliner]: procedures = 90, calls = 344, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 819 [2021-12-17 14:42:32,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:42:32,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:42:32,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:42:32,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:42:32,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:42:32,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:42:32,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:42:32,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:42:32,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (1/1) ... [2021-12-17 14:42:32,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:42:32,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:42:32,315 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) [2021-12-17 14:42:32,359 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 [2021-12-17 14:42:32,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:42:32,371 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-12-17 14:42:32,371 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-12-17 14:42:32,371 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-17 14:42:32,371 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-17 14:42:32,371 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-17 14:42:32,372 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-17 14:42:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-17 14:42:32,373 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-17 14:42:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-12-17 14:42:32,373 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-12-17 14:42:32,374 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-17 14:42:32,374 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-17 14:42:32,374 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-17 14:42:32,374 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-17 14:42:32,374 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-17 14:42:32,374 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-17 14:42:32,374 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-17 14:42:32,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-17 14:42:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-17 14:42:32,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-17 14:42:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-17 14:42:32,375 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-17 14:42:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-17 14:42:32,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-17 14:42:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-12-17 14:42:32,375 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-12-17 14:42:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-17 14:42:32,376 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-17 14:42:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-17 14:42:32,376 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-17 14:42:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-12-17 14:42:32,376 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-12-17 14:42:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-17 14:42:32,377 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-17 14:42:32,377 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-17 14:42:32,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-17 14:42:32,377 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-17 14:42:32,377 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-17 14:42:32,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:42:32,377 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2021-12-17 14:42:32,378 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2021-12-17 14:42:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-17 14:42:32,378 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-17 14:42:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-17 14:42:32,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-17 14:42:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-17 14:42:32,378 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-17 14:42:32,379 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-17 14:42:32,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-17 14:42:32,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:42:32,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:42:32,379 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-17 14:42:32,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-17 14:42:32,504 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:42:32,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:42:33,110 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:42:33,117 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:42:33,117 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:42:33,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:42:33 BoogieIcfgContainer [2021-12-17 14:42:33,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:42:33,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:42:33,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:42:33,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:42:33,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:42:31" (1/3) ... [2021-12-17 14:42:33,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d47a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:42:33, skipping insertion in model container [2021-12-17 14:42:33,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:42:32" (2/3) ... [2021-12-17 14:42:33,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d47a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:42:33, skipping insertion in model container [2021-12-17 14:42:33,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:42:33" (3/3) ... [2021-12-17 14:42:33,125 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2021-12-17 14:42:33,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:42:33,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:42:33,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:42:33,165 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 [2021-12-17 14:42:33,165 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:42:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 569 states, 440 states have (on average 1.684090909090909) internal successors, (741), 460 states have internal predecessors, (741), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2021-12-17 14:42:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 14:42:33,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:42:33,196 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:42:33,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:42:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:42:33,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1004821235, now seen corresponding path program 1 times [2021-12-17 14:42:33,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:42:33,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708719688] [2021-12-17 14:42:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:42:33,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:42:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:42:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 14:42:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 14:42:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:42:33,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:42:33,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708719688] [2021-12-17 14:42:33,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708719688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:42:33,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:42:33,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:42:33,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767363357] [2021-12-17 14:42:33,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:42:33,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:42:33,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:42:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:42:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:42:33,885 INFO L87 Difference]: Start difference. First operand has 569 states, 440 states have (on average 1.684090909090909) internal successors, (741), 460 states have internal predecessors, (741), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:42:38,636 INFO L93 Difference]: Finished difference Result 1410 states and 2435 transitions. [2021-12-17 14:42:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:42:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-12-17 14:42:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:42:38,662 INFO L225 Difference]: With dead ends: 1410 [2021-12-17 14:42:38,662 INFO L226 Difference]: Without dead ends: 845 [2021-12-17 14:42:38,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:42:38,670 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 1486 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 4349 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 3319 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 4349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:42:38,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 3319 Invalid, 4787 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [438 Valid, 4349 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-17 14:42:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-17 14:42:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 572. [2021-12-17 14:42:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 443 states have (on average 1.674943566591422) internal successors, (742), 463 states have internal predecessors, (742), 103 states have call successors, (103), 25 states have call predecessors, (103), 25 states have return successors, (102), 97 states have call predecessors, (102), 100 states have call successors, (102) [2021-12-17 14:42:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 947 transitions. [2021-12-17 14:42:38,788 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 947 transitions. Word has length 63 [2021-12-17 14:42:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:42:38,788 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 947 transitions. [2021-12-17 14:42:38,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:38,789 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 947 transitions. [2021-12-17 14:42:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 14:42:38,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:42:38,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:42:38,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 14:42:38,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:42:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:42:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1059831445, now seen corresponding path program 1 times [2021-12-17 14:42:38,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:42:38,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135178185] [2021-12-17 14:42:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:42:38,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:42:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:39,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:39,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:42:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:39,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:39,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:39,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:42:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:39,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:42:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:42:39,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:42:39,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135178185] [2021-12-17 14:42:39,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135178185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:42:39,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:42:39,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:42:39,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858819861] [2021-12-17 14:42:39,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:42:39,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:42:39,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:42:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:42:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:42:39,096 INFO L87 Difference]: Start difference. First operand 572 states and 947 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:42:43,590 INFO L93 Difference]: Finished difference Result 1404 states and 2399 transitions. [2021-12-17 14:42:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 14:42:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-12-17 14:42:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:42:43,596 INFO L225 Difference]: With dead ends: 1404 [2021-12-17 14:42:43,596 INFO L226 Difference]: Without dead ends: 848 [2021-12-17 14:42:43,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:42:43,599 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1453 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 4396 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 3480 SdHoareTripleChecker+Invalid, 4818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 4396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:42:43,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 3480 Invalid, 4818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 4396 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-17 14:42:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-12-17 14:42:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 572. [2021-12-17 14:42:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 443 states have (on average 1.672686230248307) internal successors, (741), 463 states have internal predecessors, (741), 103 states have call successors, (103), 25 states have call predecessors, (103), 25 states have return successors, (102), 97 states have call predecessors, (102), 100 states have call successors, (102) [2021-12-17 14:42:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 946 transitions. [2021-12-17 14:42:43,639 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 946 transitions. Word has length 64 [2021-12-17 14:42:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:42:43,640 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 946 transitions. [2021-12-17 14:42:43,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 946 transitions. [2021-12-17 14:42:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 14:42:43,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:42:43,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:42:43,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 14:42:43,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:42:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:42:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1766289498, now seen corresponding path program 1 times [2021-12-17 14:42:43,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:42:43,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955709705] [2021-12-17 14:42:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:42:43,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:42:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:42:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:42:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:42:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:42:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:42:43,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:42:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955709705] [2021-12-17 14:42:43,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955709705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:42:43,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:42:43,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:42:43,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332058648] [2021-12-17 14:42:43,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:42:43,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:42:43,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:42:43,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:42:43,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:42:43,861 INFO L87 Difference]: Start difference. First operand 572 states and 946 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 14:42:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:42:47,238 INFO L93 Difference]: Finished difference Result 1395 states and 2379 transitions. [2021-12-17 14:42:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 14:42:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2021-12-17 14:42:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:42:47,243 INFO L225 Difference]: With dead ends: 1395 [2021-12-17 14:42:47,243 INFO L226 Difference]: Without dead ends: 808 [2021-12-17 14:42:47,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:42:47,246 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 786 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 2514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:42:47,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 2057 Invalid, 2514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 14:42:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-12-17 14:42:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 548. [2021-12-17 14:42:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 422 states have (on average 1.6635071090047393) internal successors, (702), 440 states have internal predecessors, (702), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:42:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 903 transitions. [2021-12-17 14:42:47,276 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 903 transitions. Word has length 64 [2021-12-17 14:42:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:42:47,277 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 903 transitions. [2021-12-17 14:42:47,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 14:42:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 903 transitions. [2021-12-17 14:42:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 14:42:47,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:42:47,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:42:47,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 14:42:47,278 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:42:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:42:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1197979303, now seen corresponding path program 1 times [2021-12-17 14:42:47,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:42:47,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912402476] [2021-12-17 14:42:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:42:47,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:42:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:42:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:42:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:42:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:42:47,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:42:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912402476] [2021-12-17 14:42:47,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912402476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:42:47,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:42:47,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:42:47,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644748726] [2021-12-17 14:42:47,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:42:47,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:42:47,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:42:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:42:47,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:42:47,535 INFO L87 Difference]: Start difference. First operand 548 states and 903 transitions. Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:42:51,849 INFO L93 Difference]: Finished difference Result 1358 states and 2310 transitions. [2021-12-17 14:42:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:42:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 14:42:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:42:51,854 INFO L225 Difference]: With dead ends: 1358 [2021-12-17 14:42:51,854 INFO L226 Difference]: Without dead ends: 802 [2021-12-17 14:42:51,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:42:51,857 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 1418 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 4195 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 4627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 4195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:42:51,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 3184 Invalid, 4627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 4195 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-17 14:42:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-17 14:42:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 542. [2021-12-17 14:42:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 416 states have (on average 1.65625) internal successors, (689), 434 states have internal predecessors, (689), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:42:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 890 transitions. [2021-12-17 14:42:51,889 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 890 transitions. Word has length 65 [2021-12-17 14:42:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:42:51,889 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 890 transitions. [2021-12-17 14:42:51,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 890 transitions. [2021-12-17 14:42:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 14:42:51,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:42:51,890 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:42:51,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 14:42:51,890 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:42:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:42:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1604724541, now seen corresponding path program 1 times [2021-12-17 14:42:51,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:42:51,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112926795] [2021-12-17 14:42:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:42:51,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:42:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:42:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:42:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 14:42:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:42:52,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:42:52,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112926795] [2021-12-17 14:42:52,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112926795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:42:52,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:42:52,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:42:52,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194570011] [2021-12-17 14:42:52,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:42:52,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:42:52,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:42:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:42:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:42:52,186 INFO L87 Difference]: Start difference. First operand 542 states and 890 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:42:56,084 INFO L93 Difference]: Finished difference Result 1328 states and 2259 transitions. [2021-12-17 14:42:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:42:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 66 [2021-12-17 14:42:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:42:56,092 INFO L225 Difference]: With dead ends: 1328 [2021-12-17 14:42:56,093 INFO L226 Difference]: Without dead ends: 802 [2021-12-17 14:42:56,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:42:56,095 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 1333 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 4148 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 4148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 14:42:56,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 3331 Invalid, 4575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 4148 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 14:42:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-17 14:42:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 542. [2021-12-17 14:42:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 416 states have (on average 1.6538461538461537) internal successors, (688), 434 states have internal predecessors, (688), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:42:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 889 transitions. [2021-12-17 14:42:56,134 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 889 transitions. Word has length 66 [2021-12-17 14:42:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:42:56,134 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 889 transitions. [2021-12-17 14:42:56,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:42:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 889 transitions. [2021-12-17 14:42:56,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 14:42:56,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:42:56,135 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:42:56,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 14:42:56,136 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:42:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:42:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1448692618, now seen corresponding path program 1 times [2021-12-17 14:42:56,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:42:56,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747600485] [2021-12-17 14:42:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:42:56,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:42:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:42:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:42:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:42:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:42:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:42:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:42:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:42:56,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:42:56,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747600485] [2021-12-17 14:42:56,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747600485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:42:56,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:42:56,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:42:56,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069812006] [2021-12-17 14:42:56,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:42:56,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:42:56,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:42:56,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:42:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:42:56,404 INFO L87 Difference]: Start difference. First operand 542 states and 889 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:00,791 INFO L93 Difference]: Finished difference Result 1346 states and 2279 transitions. [2021-12-17 14:43:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:43:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 67 [2021-12-17 14:43:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:00,816 INFO L225 Difference]: With dead ends: 1346 [2021-12-17 14:43:00,816 INFO L226 Difference]: Without dead ends: 796 [2021-12-17 14:43:00,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:43:00,821 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 1370 mSDsluCounter, 2653 mSDsCounter, 0 mSdLazyCounter, 4135 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 3528 SdHoareTripleChecker+Invalid, 4544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 4135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:00,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1472 Valid, 3528 Invalid, 4544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 4135 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-17 14:43:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-12-17 14:43:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 536. [2021-12-17 14:43:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 410 states have (on average 1.646341463414634) internal successors, (675), 428 states have internal predecessors, (675), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:43:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 876 transitions. [2021-12-17 14:43:00,874 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 876 transitions. Word has length 67 [2021-12-17 14:43:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:00,874 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 876 transitions. [2021-12-17 14:43:00,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 876 transitions. [2021-12-17 14:43:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 14:43:00,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:00,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:43:00,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 14:43:00,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 148336254, now seen corresponding path program 1 times [2021-12-17 14:43:00,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:00,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975526287] [2021-12-17 14:43:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:00,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 14:43:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 14:43:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:43:01,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:01,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975526287] [2021-12-17 14:43:01,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975526287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:01,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:01,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:43:01,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101527383] [2021-12-17 14:43:01,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:01,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:43:01,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:43:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:01,139 INFO L87 Difference]: Start difference. First operand 536 states and 876 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:05,551 INFO L93 Difference]: Finished difference Result 1316 states and 2230 transitions. [2021-12-17 14:43:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:43:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-12-17 14:43:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:05,575 INFO L225 Difference]: With dead ends: 1316 [2021-12-17 14:43:05,575 INFO L226 Difference]: Without dead ends: 796 [2021-12-17 14:43:05,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:43:05,577 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 775 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 4213 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 4213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:05,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 3380 Invalid, 4429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 4213 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-17 14:43:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-12-17 14:43:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 536. [2021-12-17 14:43:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 410 states have (on average 1.6439024390243901) internal successors, (674), 428 states have internal predecessors, (674), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:43:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 875 transitions. [2021-12-17 14:43:05,607 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 875 transitions. Word has length 68 [2021-12-17 14:43:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:05,607 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 875 transitions. [2021-12-17 14:43:05,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 875 transitions. [2021-12-17 14:43:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 14:43:05,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:05,608 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:43:05,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 14:43:05,608 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:05,609 INFO L85 PathProgramCache]: Analyzing trace with hash 685380634, now seen corresponding path program 1 times [2021-12-17 14:43:05,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:05,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95525591] [2021-12-17 14:43:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:05,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 14:43:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:43:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:43:05,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95525591] [2021-12-17 14:43:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95525591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:05,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:05,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:43:05,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408638076] [2021-12-17 14:43:05,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:05,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:43:05,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:43:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:05,859 INFO L87 Difference]: Start difference. First operand 536 states and 875 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:09,833 INFO L93 Difference]: Finished difference Result 1334 states and 2248 transitions. [2021-12-17 14:43:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:43:09,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-12-17 14:43:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:09,854 INFO L225 Difference]: With dead ends: 1334 [2021-12-17 14:43:09,854 INFO L226 Difference]: Without dead ends: 790 [2021-12-17 14:43:09,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:43:09,858 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 802 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 4207 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 4423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 4207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:09,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 3373 Invalid, 4423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 4207 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 14:43:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-12-17 14:43:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 530. [2021-12-17 14:43:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 404 states have (on average 1.636138613861386) internal successors, (661), 422 states have internal predecessors, (661), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:43:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 862 transitions. [2021-12-17 14:43:09,915 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 862 transitions. Word has length 69 [2021-12-17 14:43:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:09,915 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 862 transitions. [2021-12-17 14:43:09,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 862 transitions. [2021-12-17 14:43:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 14:43:09,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:09,918 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:43:09,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 14:43:09,918 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1086867271, now seen corresponding path program 1 times [2021-12-17 14:43:09,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:09,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542797291] [2021-12-17 14:43:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:09,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 14:43:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:43:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:43:10,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:10,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542797291] [2021-12-17 14:43:10,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542797291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:10,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:10,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:43:10,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700440606] [2021-12-17 14:43:10,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:10,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:43:10,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:43:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:10,169 INFO L87 Difference]: Start difference. First operand 530 states and 862 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:14,076 INFO L93 Difference]: Finished difference Result 1304 states and 2201 transitions. [2021-12-17 14:43:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:43:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-12-17 14:43:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:14,080 INFO L225 Difference]: With dead ends: 1304 [2021-12-17 14:43:14,080 INFO L226 Difference]: Without dead ends: 790 [2021-12-17 14:43:14,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:43:14,082 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 1280 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 4404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:14,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1382 Valid, 3322 Invalid, 4404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 3974 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 14:43:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-12-17 14:43:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 530. [2021-12-17 14:43:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 404 states have (on average 1.6336633663366336) internal successors, (660), 422 states have internal predecessors, (660), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:43:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 861 transitions. [2021-12-17 14:43:14,112 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 861 transitions. Word has length 69 [2021-12-17 14:43:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:14,113 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 861 transitions. [2021-12-17 14:43:14,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 861 transitions. [2021-12-17 14:43:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 14:43:14,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:14,114 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:43:14,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 14:43:14,114 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:14,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:14,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1086246916, now seen corresponding path program 1 times [2021-12-17 14:43:14,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836453830] [2021-12-17 14:43:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:14,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:43:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:43:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:43:14,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:14,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836453830] [2021-12-17 14:43:14,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836453830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:14,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:14,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:43:14,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714292871] [2021-12-17 14:43:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:14,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:43:14,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:43:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:14,367 INFO L87 Difference]: Start difference. First operand 530 states and 861 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:18,473 INFO L93 Difference]: Finished difference Result 1316 states and 2211 transitions. [2021-12-17 14:43:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:43:18,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-12-17 14:43:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:18,477 INFO L225 Difference]: With dead ends: 1316 [2021-12-17 14:43:18,477 INFO L226 Difference]: Without dead ends: 802 [2021-12-17 14:43:18,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:43:18,479 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 1280 mSDsluCounter, 2700 mSDsCounter, 0 mSdLazyCounter, 4010 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 4425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 4010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:18,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1382 Valid, 3546 Invalid, 4425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 4010 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 14:43:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-17 14:43:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 536. [2021-12-17 14:43:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 410 states have (on average 1.6243902439024391) internal successors, (666), 428 states have internal predecessors, (666), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:43:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 867 transitions. [2021-12-17 14:43:18,515 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 867 transitions. Word has length 70 [2021-12-17 14:43:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:18,516 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 867 transitions. [2021-12-17 14:43:18,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 867 transitions. [2021-12-17 14:43:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 14:43:18,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:18,518 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:43:18,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 14:43:18,518 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 242241414, now seen corresponding path program 1 times [2021-12-17 14:43:18,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:18,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543753900] [2021-12-17 14:43:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:18,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:43:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:43:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:43:18,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543753900] [2021-12-17 14:43:18,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543753900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:18,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:18,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:43:18,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841002671] [2021-12-17 14:43:18,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:18,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:43:18,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:43:18,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:18,781 INFO L87 Difference]: Start difference. First operand 536 states and 867 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:21,885 INFO L93 Difference]: Finished difference Result 1319 states and 2212 transitions. [2021-12-17 14:43:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:43:21,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-12-17 14:43:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:21,890 INFO L225 Difference]: With dead ends: 1319 [2021-12-17 14:43:21,890 INFO L226 Difference]: Without dead ends: 790 [2021-12-17 14:43:21,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:43:21,892 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1286 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 3980 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 3386 SdHoareTripleChecker+Invalid, 4404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 3980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:21,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1388 Valid, 3386 Invalid, 4404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 3980 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 14:43:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-12-17 14:43:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 530. [2021-12-17 14:43:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 404 states have (on average 1.631188118811881) internal successors, (659), 422 states have internal predecessors, (659), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-12-17 14:43:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 860 transitions. [2021-12-17 14:43:21,928 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 860 transitions. Word has length 70 [2021-12-17 14:43:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:21,929 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 860 transitions. [2021-12-17 14:43:21,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 860 transitions. [2021-12-17 14:43:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 14:43:21,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:21,930 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:43:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 14:43:21,930 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 961451487, now seen corresponding path program 1 times [2021-12-17 14:43:21,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:21,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10157708] [2021-12-17 14:43:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:21,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:43:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 14:43:22,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10157708] [2021-12-17 14:43:22,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10157708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:43:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060506775] [2021-12-17 14:43:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:22,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:43:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:43:22,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:43:22,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:43:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:22,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:43:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:43:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:43:22,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:43:22,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060506775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:22,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:43:22,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-17 14:43:22,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302551675] [2021-12-17 14:43:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:22,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:43:22,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:43:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:22,550 INFO L87 Difference]: Start difference. First operand 530 states and 860 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:22,632 INFO L93 Difference]: Finished difference Result 1502 states and 2470 transitions. [2021-12-17 14:43:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:43:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2021-12-17 14:43:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:22,636 INFO L225 Difference]: With dead ends: 1502 [2021-12-17 14:43:22,636 INFO L226 Difference]: Without dead ends: 990 [2021-12-17 14:43:22,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:22,639 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 828 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:22,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1704 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:43:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-12-17 14:43:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 975. [2021-12-17 14:43:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 750 states have (on average 1.6453333333333333) internal successors, (1234), 785 states have internal predecessors, (1234), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2021-12-17 14:43:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1596 transitions. [2021-12-17 14:43:22,713 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1596 transitions. Word has length 71 [2021-12-17 14:43:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:22,713 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 1596 transitions. [2021-12-17 14:43:22,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1596 transitions. [2021-12-17 14:43:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 14:43:22,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:22,714 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:43:22,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 14:43:22,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 14:43:22,932 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash 578313413, now seen corresponding path program 1 times [2021-12-17 14:43:22,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959968370] [2021-12-17 14:43:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:22,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 14:43:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 14:43:23,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959968370] [2021-12-17 14:43:23,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959968370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:43:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659814586] [2021-12-17 14:43:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:23,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:43:23,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:43:23,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:43:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:43:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:43:23,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:43:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:43:23,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:43:23,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659814586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:23,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:43:23,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-17 14:43:23,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863864880] [2021-12-17 14:43:23,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:23,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:43:23,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:23,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:43:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:23,556 INFO L87 Difference]: Start difference. First operand 975 states and 1596 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:23,641 INFO L93 Difference]: Finished difference Result 2392 states and 3944 transitions. [2021-12-17 14:43:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:43:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-12-17 14:43:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:23,646 INFO L225 Difference]: With dead ends: 2392 [2021-12-17 14:43:23,647 INFO L226 Difference]: Without dead ends: 1435 [2021-12-17 14:43:23,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:23,650 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 827 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:23,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1759 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:43:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-12-17 14:43:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1387. [2021-12-17 14:43:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1069 states have (on average 1.6585594013096352) internal successors, (1773), 1121 states have internal predecessors, (1773), 255 states have call successors, (255), 62 states have call predecessors, (255), 62 states have return successors, (262), 245 states have call predecessors, (262), 252 states have call successors, (262) [2021-12-17 14:43:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2290 transitions. [2021-12-17 14:43:23,772 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2290 transitions. Word has length 72 [2021-12-17 14:43:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:23,773 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 2290 transitions. [2021-12-17 14:43:23,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 14:43:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2290 transitions. [2021-12-17 14:43:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 14:43:23,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:23,775 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 14:43:23,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 14:43:23,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 14:43:23,992 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:23,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1235557642, now seen corresponding path program 1 times [2021-12-17 14:43:23,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:23,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331759162] [2021-12-17 14:43:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:23,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:43:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 14:43:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:43:24,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331759162] [2021-12-17 14:43:24,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331759162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:24,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:24,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 14:43:24,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611676842] [2021-12-17 14:43:24,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:24,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:43:24,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:43:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:43:24,286 INFO L87 Difference]: Start difference. First operand 1387 states and 2290 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 14:43:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:32,486 INFO L93 Difference]: Finished difference Result 5583 states and 9955 transitions. [2021-12-17 14:43:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 14:43:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2021-12-17 14:43:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:32,547 INFO L225 Difference]: With dead ends: 5583 [2021-12-17 14:43:32,547 INFO L226 Difference]: Without dead ends: 4214 [2021-12-17 14:43:32,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:43:32,552 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 3365 mSDsluCounter, 2330 mSDsCounter, 0 mSdLazyCounter, 5199 mSolverCounterSat, 1180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3496 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 6379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1180 IncrementalHoareTripleChecker+Valid, 5199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:32,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3496 Valid, 3350 Invalid, 6379 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1180 Valid, 5199 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-12-17 14:43:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2021-12-17 14:43:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 3335. [2021-12-17 14:43:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 2415 states have (on average 1.6236024844720496) internal successors, (3921), 2611 states have internal predecessors, (3921), 757 states have call successors, (757), 118 states have call predecessors, (757), 162 states have return successors, (1208), 755 states have call predecessors, (1208), 753 states have call successors, (1208) [2021-12-17 14:43:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 5886 transitions. [2021-12-17 14:43:32,871 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 5886 transitions. Word has length 74 [2021-12-17 14:43:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:32,871 INFO L470 AbstractCegarLoop]: Abstraction has 3335 states and 5886 transitions. [2021-12-17 14:43:32,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 14:43:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 5886 transitions. [2021-12-17 14:43:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 14:43:32,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:32,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:43:32,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 14:43:32,877 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:32,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1322679182, now seen corresponding path program 1 times [2021-12-17 14:43:32,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:32,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145033647] [2021-12-17 14:43:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:32,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:43:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:43:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 14:43:33,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145033647] [2021-12-17 14:43:33,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145033647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:43:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602053446] [2021-12-17 14:43:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:33,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:43:33,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:43:33,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:43:33,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:43:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:33,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 14:43:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:43:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:43:33,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:43:33,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602053446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:33,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:43:33,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-17 14:43:33,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277106229] [2021-12-17 14:43:33,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:33,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:43:33,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:43:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:43:33,565 INFO L87 Difference]: Start difference. First operand 3335 states and 5886 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 14:43:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:34,246 INFO L93 Difference]: Finished difference Result 9150 states and 16354 transitions. [2021-12-17 14:43:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 14:43:34,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2021-12-17 14:43:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:34,297 INFO L225 Difference]: With dead ends: 9150 [2021-12-17 14:43:34,298 INFO L226 Difference]: Without dead ends: 5833 [2021-12-17 14:43:34,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:43:34,319 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 831 mSDsluCounter, 2727 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:34,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 3707 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:43:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2021-12-17 14:43:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5676. [2021-12-17 14:43:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5676 states, 4116 states have (on average 1.5777453838678328) internal successors, (6494), 4442 states have internal predecessors, (6494), 1264 states have call successors, (1264), 210 states have call predecessors, (1264), 295 states have return successors, (2119), 1273 states have call predecessors, (2119), 1258 states have call successors, (2119) [2021-12-17 14:43:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 9877 transitions. [2021-12-17 14:43:34,830 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 9877 transitions. Word has length 75 [2021-12-17 14:43:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:34,830 INFO L470 AbstractCegarLoop]: Abstraction has 5676 states and 9877 transitions. [2021-12-17 14:43:34,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 14:43:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 9877 transitions. [2021-12-17 14:43:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 14:43:34,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:34,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:43:34,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 14:43:35,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:43:35,049 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1577052075, now seen corresponding path program 1 times [2021-12-17 14:43:35,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:35,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960352435] [2021-12-17 14:43:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:35,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:43:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:43:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:43:35,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960352435] [2021-12-17 14:43:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960352435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:35,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:35,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:43:35,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422920221] [2021-12-17 14:43:35,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:35,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:43:35,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:43:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:43:35,283 INFO L87 Difference]: Start difference. First operand 5676 states and 9877 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 14:43:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:38,892 INFO L93 Difference]: Finished difference Result 12560 states and 22336 transitions. [2021-12-17 14:43:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:43:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2021-12-17 14:43:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:38,928 INFO L225 Difference]: With dead ends: 12560 [2021-12-17 14:43:38,928 INFO L226 Difference]: Without dead ends: 6902 [2021-12-17 14:43:38,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:38,952 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 1263 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:38,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 2002 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 14:43:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6902 states. [2021-12-17 14:43:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6902 to 6116. [2021-12-17 14:43:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 4314 states have (on average 1.5693092257765415) internal successors, (6770), 4680 states have internal predecessors, (6770), 1496 states have call successors, (1496), 214 states have call predecessors, (1496), 305 states have return successors, (2538), 1511 states have call predecessors, (2538), 1490 states have call successors, (2538) [2021-12-17 14:43:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 10804 transitions. [2021-12-17 14:43:39,539 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 10804 transitions. Word has length 75 [2021-12-17 14:43:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:39,540 INFO L470 AbstractCegarLoop]: Abstraction has 6116 states and 10804 transitions. [2021-12-17 14:43:39,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 14:43:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 10804 transitions. [2021-12-17 14:43:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 14:43:39,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:39,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:43:39,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 14:43:39,542 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash 933412143, now seen corresponding path program 1 times [2021-12-17 14:43:39,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:39,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319697816] [2021-12-17 14:43:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:39,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:43:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:43:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 14:43:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:43:39,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319697816] [2021-12-17 14:43:39,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319697816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:39,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:39,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 14:43:39,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790754666] [2021-12-17 14:43:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:39,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:43:39,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:43:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:43:39,838 INFO L87 Difference]: Start difference. First operand 6116 states and 10804 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 14:43:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:49,033 INFO L93 Difference]: Finished difference Result 20586 states and 38915 transitions. [2021-12-17 14:43:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 14:43:49,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2021-12-17 14:43:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:49,105 INFO L225 Difference]: With dead ends: 20586 [2021-12-17 14:43:49,105 INFO L226 Difference]: Without dead ends: 14488 [2021-12-17 14:43:49,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:43:49,138 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 2339 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 5299 mSolverCounterSat, 796 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2469 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 6095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 5299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:49,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2469 Valid, 3254 Invalid, 6095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 5299 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-12-17 14:43:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14488 states. [2021-12-17 14:43:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14488 to 12320. [2021-12-17 14:43:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12320 states, 8650 states have (on average 1.564393063583815) internal successors, (13532), 9389 states have internal predecessors, (13532), 3054 states have call successors, (3054), 422 states have call predecessors, (3054), 615 states have return successors, (5872), 3103 states have call predecessors, (5872), 3044 states have call successors, (5872) [2021-12-17 14:43:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12320 states to 12320 states and 22458 transitions. [2021-12-17 14:43:50,456 INFO L78 Accepts]: Start accepts. Automaton has 12320 states and 22458 transitions. Word has length 83 [2021-12-17 14:43:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:50,456 INFO L470 AbstractCegarLoop]: Abstraction has 12320 states and 22458 transitions. [2021-12-17 14:43:50,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 14:43:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 12320 states and 22458 transitions. [2021-12-17 14:43:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 14:43:50,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:50,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:43:50,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 14:43:50,459 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash -12224914, now seen corresponding path program 1 times [2021-12-17 14:43:50,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:50,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175410469] [2021-12-17 14:43:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:50,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:43:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:43:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:43:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:43:50,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:50,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175410469] [2021-12-17 14:43:50,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175410469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:50,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:50,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:43:50,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830254020] [2021-12-17 14:43:50,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:50,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:43:50,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:43:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:43:50,694 INFO L87 Difference]: Start difference. First operand 12320 states and 22458 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 14:43:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:43:55,612 INFO L93 Difference]: Finished difference Result 25974 states and 48367 transitions. [2021-12-17 14:43:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:43:55,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2021-12-17 14:43:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:43:55,679 INFO L225 Difference]: With dead ends: 25974 [2021-12-17 14:43:55,680 INFO L226 Difference]: Without dead ends: 13672 [2021-12-17 14:43:55,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:43:55,734 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 750 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:43:55,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 2061 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 14:43:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13672 states. [2021-12-17 14:43:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13672 to 12360. [2021-12-17 14:43:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12360 states, 8686 states have (on average 1.5625143909739811) internal successors, (13572), 9417 states have internal predecessors, (13572), 3054 states have call successors, (3054), 438 states have call predecessors, (3054), 619 states have return successors, (5852), 3099 states have call predecessors, (5852), 3044 states have call successors, (5852) [2021-12-17 14:43:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12360 states to 12360 states and 22478 transitions. [2021-12-17 14:43:56,927 INFO L78 Accepts]: Start accepts. Automaton has 12360 states and 22478 transitions. Word has length 84 [2021-12-17 14:43:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:43:56,928 INFO L470 AbstractCegarLoop]: Abstraction has 12360 states and 22478 transitions. [2021-12-17 14:43:56,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 14:43:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 12360 states and 22478 transitions. [2021-12-17 14:43:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 14:43:56,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:43:56,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:43:56,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 14:43:56,930 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:43:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:43:56,930 INFO L85 PathProgramCache]: Analyzing trace with hash 126852297, now seen corresponding path program 1 times [2021-12-17 14:43:56,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:43:56,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528243074] [2021-12-17 14:43:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:43:56,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:43:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:43:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:43:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:43:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:43:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:43:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:43:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:43:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:43:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:43:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 14:43:57,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:43:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528243074] [2021-12-17 14:43:57,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528243074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:43:57,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:43:57,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 14:43:57,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922450889] [2021-12-17 14:43:57,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:43:57,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:43:57,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:43:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:43:57,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:43:57,334 INFO L87 Difference]: Start difference. First operand 12360 states and 22478 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 14:44:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:44:07,900 INFO L93 Difference]: Finished difference Result 41334 states and 83943 transitions. [2021-12-17 14:44:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 14:44:07,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 93 [2021-12-17 14:44:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:44:08,091 INFO L225 Difference]: With dead ends: 41334 [2021-12-17 14:44:08,091 INFO L226 Difference]: Without dead ends: 28992 [2021-12-17 14:44:08,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:44:08,168 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 3349 mSDsluCounter, 2177 mSDsCounter, 0 mSdLazyCounter, 5115 mSolverCounterSat, 1176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3140 SdHoareTripleChecker+Invalid, 6291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1176 IncrementalHoareTripleChecker+Valid, 5115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:44:08,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3479 Valid, 3140 Invalid, 6291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1176 Valid, 5115 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-12-17 14:44:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28992 states. [2021-12-17 14:44:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28992 to 24802. [2021-12-17 14:44:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24802 states, 17427 states have (on average 1.558673323004533) internal successors, (27163), 18889 states have internal predecessors, (27163), 6121 states have call successors, (6121), 870 states have call predecessors, (6121), 1253 states have return successors, (13818), 6237 states have call predecessors, (13818), 6103 states have call successors, (13818) [2021-12-17 14:44:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24802 states to 24802 states and 47102 transitions. [2021-12-17 14:44:11,140 INFO L78 Accepts]: Start accepts. Automaton has 24802 states and 47102 transitions. Word has length 93 [2021-12-17 14:44:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:44:11,141 INFO L470 AbstractCegarLoop]: Abstraction has 24802 states and 47102 transitions. [2021-12-17 14:44:11,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 14:44:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 24802 states and 47102 transitions. [2021-12-17 14:44:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-17 14:44:11,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:44:11,143 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:44:11,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 14:44:11,143 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:44:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:44:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -58477476, now seen corresponding path program 1 times [2021-12-17 14:44:11,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:44:11,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303221192] [2021-12-17 14:44:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:44:11,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:44:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:44:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:44:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:44:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:44:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:44:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:44:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:44:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:44:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:44:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 14:44:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 14:44:11,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:44:11,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303221192] [2021-12-17 14:44:11,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303221192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:44:11,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:44:11,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:44:11,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048759398] [2021-12-17 14:44:11,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:44:11,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:44:11,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:44:11,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:44:11,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:44:11,368 INFO L87 Difference]: Start difference. First operand 24802 states and 47102 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 14:44:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:44:17,687 INFO L93 Difference]: Finished difference Result 52120 states and 103047 transitions. [2021-12-17 14:44:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:44:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 94 [2021-12-17 14:44:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:44:17,975 INFO L225 Difference]: With dead ends: 52120 [2021-12-17 14:44:17,975 INFO L226 Difference]: Without dead ends: 27336 [2021-12-17 14:44:18,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:44:18,084 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 752 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:44:18,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 2021 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 14:44:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27336 states. [2021-12-17 14:44:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27336 to 24882. [2021-12-17 14:44:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 17499 states have (on average 1.5568318189610835) internal successors, (27243), 18961 states have internal predecessors, (27243), 6121 states have call successors, (6121), 886 states have call predecessors, (6121), 1261 states have return successors, (13790), 6229 states have call predecessors, (13790), 6103 states have call successors, (13790) [2021-12-17 14:44:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 47154 transitions. [2021-12-17 14:44:20,891 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 47154 transitions. Word has length 94 [2021-12-17 14:44:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:44:20,891 INFO L470 AbstractCegarLoop]: Abstraction has 24882 states and 47154 transitions. [2021-12-17 14:44:20,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 14:44:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 47154 transitions. [2021-12-17 14:44:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 14:44:20,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:44:20,909 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:44:20,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 14:44:20,910 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:44:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:44:20,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1562802759, now seen corresponding path program 1 times [2021-12-17 14:44:20,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:44:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220031805] [2021-12-17 14:44:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:44:20,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:44:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:44:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:44:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:44:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:44:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:44:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 14:44:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:44:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:44:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 14:44:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:44:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 14:44:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 14:44:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-17 14:44:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 14:44:21,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:44:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220031805] [2021-12-17 14:44:21,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220031805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:44:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156543058] [2021-12-17 14:44:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:44:21,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:44:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:44:21,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:44:21,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:44:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 14:44:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:44:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-17 14:44:21,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:44:21,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156543058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:44:21,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:44:21,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-17 14:44:21,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225079654] [2021-12-17 14:44:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:44:21,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:44:21,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:44:21,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:44:21,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:44:21,856 INFO L87 Difference]: Start difference. First operand 24882 states and 47154 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 14:44:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:44:31,507 INFO L93 Difference]: Finished difference Result 89925 states and 178161 transitions. [2021-12-17 14:44:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 14:44:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2021-12-17 14:44:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:44:32,035 INFO L225 Difference]: With dead ends: 89925 [2021-12-17 14:44:32,035 INFO L226 Difference]: Without dead ends: 65061 [2021-12-17 14:44:32,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-12-17 14:44:32,221 INFO L933 BasicCegarLoop]: 1513 mSDtfsCounter, 3077 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 5861 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3236 SdHoareTripleChecker+Valid, 3235 SdHoareTripleChecker+Invalid, 6613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 5861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:44:32,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3236 Valid, 3235 Invalid, 6613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 5861 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 14:44:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65061 states. [2021-12-17 14:44:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65061 to 58562. [2021-12-17 14:44:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58562 states, 42308 states have (on average 1.5594922946014937) internal successors, (65979), 45578 states have internal predecessors, (65979), 13088 states have call successors, (13088), 2206 states have call predecessors, (13088), 3165 states have return successors, (32200), 13369 states have call predecessors, (32200), 13054 states have call successors, (32200) [2021-12-17 14:44:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58562 states to 58562 states and 111267 transitions. [2021-12-17 14:44:39,213 INFO L78 Accepts]: Start accepts. Automaton has 58562 states and 111267 transitions. Word has length 128 [2021-12-17 14:44:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:44:39,213 INFO L470 AbstractCegarLoop]: Abstraction has 58562 states and 111267 transitions. [2021-12-17 14:44:39,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 14:44:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 58562 states and 111267 transitions. [2021-12-17 14:44:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 14:44:39,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:44:39,214 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:44:39,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 14:44:39,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:44:39,427 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:44:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:44:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1258819056, now seen corresponding path program 1 times [2021-12-17 14:44:39,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:44:39,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511687833] [2021-12-17 14:44:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:44:39,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:44:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:44:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:44:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:44:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:44:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:44:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 14:44:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:44:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:44:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:44:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 14:44:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 14:44:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:44:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 14:44:39,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:44:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511687833] [2021-12-17 14:44:39,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511687833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:44:39,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:44:39,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 14:44:39,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297937698] [2021-12-17 14:44:39,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:44:39,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:44:39,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:44:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:44:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:44:39,719 INFO L87 Difference]: Start difference. First operand 58562 states and 111267 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11)