./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/product-lines/elevator_spec2_product22.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 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:56:32,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:56:32,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:56:32,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:56:32,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:56:32,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:56:32,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:56:32,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:56:32,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:56:32,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:56:32,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:56:32,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:56:32,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:56:32,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:56:32,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:56:32,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:56:32,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:56:32,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:56:32,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:56:32,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:56:32,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:56:32,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:56:32,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:56:32,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:56:32,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:56:32,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:56:32,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:56:32,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:56:32,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:56:32,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:56:32,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:56:32,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:56:32,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:56:32,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:56:32,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:56:32,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:56:32,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:56:32,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:56:32,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:56:32,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:56:32,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:56:32,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:56:32,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:56:32,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:56:32,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:56:32,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:56:32,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:56:32,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:56:32,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:56:32,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:56:32,430 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:56:32,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:56:32,435 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:56:32,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:56:32,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:56:32,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:56:32,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:56:32,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:56:32,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:56:32,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:56:32,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:56:32,436 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:56:32,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:56:32,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:56:32,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:56:32,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:56:32,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:56:32,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:56:32,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:56:32,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:56:32,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:56:32,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:56:32,438 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:56:32,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:56:32,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:56:32,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:56:32,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-12-21 12:56:32,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:56:32,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:56:32,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:56:32,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:56:32,649 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:56:32,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-12-21 12:56:32,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c190a7a7b/313a7adfc6c24720bf0c7f2f5db57d73/FLAG60a8b41d7 [2021-12-21 12:56:33,230 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:56:33,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-12-21 12:56:33,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c190a7a7b/313a7adfc6c24720bf0c7f2f5db57d73/FLAG60a8b41d7 [2021-12-21 12:56:33,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c190a7a7b/313a7adfc6c24720bf0c7f2f5db57d73 [2021-12-21 12:56:33,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:56:33,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:56:33,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:56:33,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:56:33,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:56:33,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:56:33" (1/1) ... [2021-12-21 12:56:33,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8d6f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:33, skipping insertion in model container [2021-12-21 12:56:33,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:56:33" (1/1) ... [2021-12-21 12:56:33,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:56:33,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:56:33,849 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_spec2_product22.cil.c[1545,1558] [2021-12-21 12:56:34,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:56:34,106 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:56:34,138 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_spec2_product22.cil.c[1545,1558] [2021-12-21 12:56:34,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:56:34,296 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:56:34,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34 WrapperNode [2021-12-21 12:56:34,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:56:34,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:56:34,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:56:34,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:56:34,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,364 INFO L137 Inliner]: procedures = 94, calls = 345, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 876 [2021-12-21 12:56:34,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:56:34,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:56:34,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:56:34,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:56:34,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:56:34,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:56:34,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:56:34,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:56:34,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (1/1) ... [2021-12-21 12:56:34,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:56:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:34,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:56:34,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:56:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:56:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-21 12:56:34,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-21 12:56:34,536 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-21 12:56:34,536 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-21 12:56:34,536 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-21 12:56:34,536 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-21 12:56:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-21 12:56:34,537 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-21 12:56:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-21 12:56:34,537 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-21 12:56:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-21 12:56:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-21 12:56:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-21 12:56:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-21 12:56:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-21 12:56:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-21 12:56:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-21 12:56:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-21 12:56:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-21 12:56:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-21 12:56:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-21 12:56:34,539 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-21 12:56:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-21 12:56:34,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-21 12:56:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-12-21 12:56:34,539 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-12-21 12:56:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-21 12:56:34,539 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-21 12:56:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-21 12:56:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-21 12:56:34,540 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-21 12:56:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-21 12:56:34,540 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-21 12:56:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-21 12:56:34,540 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-21 12:56:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-21 12:56:34,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:56:34,541 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-21 12:56:34,541 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-21 12:56:34,541 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-21 12:56:34,541 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-21 12:56:34,541 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-21 12:56:34,541 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-21 12:56:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-21 12:56:34,542 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-21 12:56:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-12-21 12:56:34,542 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-12-21 12:56:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-12-21 12:56:34,542 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-12-21 12:56:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:56:34,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:56:34,543 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-21 12:56:34,543 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-21 12:56:34,683 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:56:34,685 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:56:35,415 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:56:35,432 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:56:35,433 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:56:35,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:56:35 BoogieIcfgContainer [2021-12-21 12:56:35,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:56:35,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:56:35,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:56:35,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:56:35,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:56:33" (1/3) ... [2021-12-21 12:56:35,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5354b213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:56:35, skipping insertion in model container [2021-12-21 12:56:35,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:56:34" (2/3) ... [2021-12-21 12:56:35,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5354b213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:56:35, skipping insertion in model container [2021-12-21 12:56:35,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:56:35" (3/3) ... [2021-12-21 12:56:35,440 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2021-12-21 12:56:35,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:56:35,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:56:35,475 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:56:35,480 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:56:35,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:56:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 572 states, 447 states have (on average 1.691275167785235) internal successors, (756), 470 states have internal predecessors, (756), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-21 12:56:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 12:56:35,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:35,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:56:35,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -992084887, now seen corresponding path program 1 times [2021-12-21 12:56:35,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:35,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448700672] [2021-12-21 12:56:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:35,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:35,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:35,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:35,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:56:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:36,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 12:56:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:36,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:56:36,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:36,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448700672] [2021-12-21 12:56:36,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448700672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:36,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:36,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:56:36,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929546307] [2021-12-21 12:56:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:36,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:56:36,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:56:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:56:36,133 INFO L87 Difference]: Start difference. First operand has 572 states, 447 states have (on average 1.691275167785235) internal successors, (756), 470 states have internal predecessors, (756), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:39,484 INFO L93 Difference]: Finished difference Result 1287 states and 2173 transitions. [2021-12-21 12:56:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:39,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2021-12-21 12:56:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:39,502 INFO L225 Difference]: With dead ends: 1287 [2021-12-21 12:56:39,503 INFO L226 Difference]: Without dead ends: 727 [2021-12-21 12:56:39,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:56:39,513 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 1140 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:39,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 1892 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 12:56:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-21 12:56:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-21 12:56:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6870748299319729) internal successors, (744), 462 states have internal predecessors, (744), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 12:56:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 935 transitions. [2021-12-21 12:56:39,714 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 935 transitions. Word has length 60 [2021-12-21 12:56:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:39,714 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 935 transitions. [2021-12-21 12:56:39,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 935 transitions. [2021-12-21 12:56:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 12:56:39,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:39,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:56:39,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:56:39,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1651182718, now seen corresponding path program 1 times [2021-12-21 12:56:39,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:39,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808687908] [2021-12-21 12:56:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:39,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:39,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:39,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:39,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 12:56:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:40,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:40,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:40,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:56:40,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:40,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808687908] [2021-12-21 12:56:40,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808687908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:40,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:40,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:56:40,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202986216] [2021-12-21 12:56:40,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:40,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:56:40,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:56:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:56:40,037 INFO L87 Difference]: Start difference. First operand 564 states and 935 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:43,245 INFO L93 Difference]: Finished difference Result 1273 states and 2139 transitions. [2021-12-21 12:56:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:43,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2021-12-21 12:56:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:43,250 INFO L225 Difference]: With dead ends: 1273 [2021-12-21 12:56:43,250 INFO L226 Difference]: Without dead ends: 727 [2021-12-21 12:56:43,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:56:43,253 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 1138 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:43,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 1851 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 12:56:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-21 12:56:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-21 12:56:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6848072562358276) internal successors, (743), 462 states have internal predecessors, (743), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 12:56:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 934 transitions. [2021-12-21 12:56:43,292 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 934 transitions. Word has length 63 [2021-12-21 12:56:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:43,292 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 934 transitions. [2021-12-21 12:56:43,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 934 transitions. [2021-12-21 12:56:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 12:56:43,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:43,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:56:43,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:56:43,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:43,295 INFO L85 PathProgramCache]: Analyzing trace with hash 722898553, now seen corresponding path program 1 times [2021-12-21 12:56:43,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:43,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382184303] [2021-12-21 12:56:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:43,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 12:56:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:56:43,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382184303] [2021-12-21 12:56:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382184303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:43,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:43,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:56:43,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78865849] [2021-12-21 12:56:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:43,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:56:43,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:56:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:56:43,576 INFO L87 Difference]: Start difference. First operand 564 states and 934 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:46,880 INFO L93 Difference]: Finished difference Result 1273 states and 2138 transitions. [2021-12-21 12:56:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:46,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2021-12-21 12:56:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:46,899 INFO L225 Difference]: With dead ends: 1273 [2021-12-21 12:56:46,899 INFO L226 Difference]: Without dead ends: 727 [2021-12-21 12:56:46,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:56:46,927 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 680 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:46,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1851 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 12:56:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-21 12:56:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-21 12:56:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6825396825396826) internal successors, (742), 462 states have internal predecessors, (742), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 12:56:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 933 transitions. [2021-12-21 12:56:47,003 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 933 transitions. Word has length 64 [2021-12-21 12:56:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:47,003 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 933 transitions. [2021-12-21 12:56:47,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 933 transitions. [2021-12-21 12:56:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 12:56:47,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:47,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:56:47,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:56:47,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash 342813406, now seen corresponding path program 1 times [2021-12-21 12:56:47,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:47,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061083690] [2021-12-21 12:56:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:47,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 12:56:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 12:56:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:56:47,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:47,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061083690] [2021-12-21 12:56:47,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061083690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:47,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:47,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:56:47,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548186797] [2021-12-21 12:56:47,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:47,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:56:47,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:56:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:56:47,326 INFO L87 Difference]: Start difference. First operand 564 states and 933 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:50,067 INFO L93 Difference]: Finished difference Result 1273 states and 2137 transitions. [2021-12-21 12:56:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-21 12:56:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:50,071 INFO L225 Difference]: With dead ends: 1273 [2021-12-21 12:56:50,072 INFO L226 Difference]: Without dead ends: 727 [2021-12-21 12:56:50,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:56:50,074 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 1133 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:50,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1840 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 12:56:50,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-21 12:56:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-21 12:56:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6802721088435375) internal successors, (741), 462 states have internal predecessors, (741), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 12:56:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 932 transitions. [2021-12-21 12:56:50,108 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 932 transitions. Word has length 65 [2021-12-21 12:56:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:50,108 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 932 transitions. [2021-12-21 12:56:50,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 932 transitions. [2021-12-21 12:56:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 12:56:50,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:50,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:56:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 12:56:50,110 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:50,110 INFO L85 PathProgramCache]: Analyzing trace with hash 482915221, now seen corresponding path program 1 times [2021-12-21 12:56:50,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:50,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275884060] [2021-12-21 12:56:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:50,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:56:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 12:56:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:56:50,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:50,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275884060] [2021-12-21 12:56:50,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275884060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:50,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:50,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:56:50,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643187497] [2021-12-21 12:56:50,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:50,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:56:50,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:56:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:56:50,397 INFO L87 Difference]: Start difference. First operand 564 states and 932 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:53,336 INFO L93 Difference]: Finished difference Result 1273 states and 2136 transitions. [2021-12-21 12:56:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:53,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-21 12:56:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:53,340 INFO L225 Difference]: With dead ends: 1273 [2021-12-21 12:56:53,341 INFO L226 Difference]: Without dead ends: 727 [2021-12-21 12:56:53,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:56:53,343 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 674 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:53,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1881 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 12:56:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-21 12:56:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-21 12:56:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6780045351473922) internal successors, (740), 462 states have internal predecessors, (740), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 12:56:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 931 transitions. [2021-12-21 12:56:53,386 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 931 transitions. Word has length 66 [2021-12-21 12:56:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:53,386 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 931 transitions. [2021-12-21 12:56:53,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:56:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 931 transitions. [2021-12-21 12:56:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 12:56:53,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:53,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:56:53,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 12:56:53,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash -431056326, now seen corresponding path program 1 times [2021-12-21 12:56:53,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:53,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612985350] [2021-12-21 12:56:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:53,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 12:56:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:56:53,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612985350] [2021-12-21 12:56:53,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612985350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:53,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:53,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:56:53,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251621659] [2021-12-21 12:56:53,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:53,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:56:53,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:56:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:56:53,671 INFO L87 Difference]: Start difference. First operand 564 states and 931 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:56:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:57,266 INFO L93 Difference]: Finished difference Result 1250 states and 2086 transitions. [2021-12-21 12:56:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:56:57,266 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 67 [2021-12-21 12:56:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:57,270 INFO L225 Difference]: With dead ends: 1250 [2021-12-21 12:56:57,270 INFO L226 Difference]: Without dead ends: 753 [2021-12-21 12:56:57,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:56:57,273 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 1239 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:57,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 3032 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 4052 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 12:56:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-12-21 12:56:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 577. [2021-12-21 12:56:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6740576496674058) internal successors, (755), 474 states have internal predecessors, (755), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:56:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 950 transitions. [2021-12-21 12:56:57,324 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 950 transitions. Word has length 67 [2021-12-21 12:56:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:57,324 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 950 transitions. [2021-12-21 12:56:57,325 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:56:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 950 transitions. [2021-12-21 12:56:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 12:56:57,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:57,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:56:57,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 12:56:57,326 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash -671596455, now seen corresponding path program 1 times [2021-12-21 12:56:57,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:57,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809867985] [2021-12-21 12:56:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:57,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 12:56:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:56:57,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809867985] [2021-12-21 12:56:57,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809867985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:57,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:57,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:56:57,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470992190] [2021-12-21 12:56:57,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:57,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:56:57,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:56:57,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:56:57,573 INFO L87 Difference]: Start difference. First operand 577 states and 950 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:00,239 INFO L93 Difference]: Finished difference Result 1264 states and 2109 transitions. [2021-12-21 12:57:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:57:00,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-12-21 12:57:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:00,243 INFO L225 Difference]: With dead ends: 1264 [2021-12-21 12:57:00,243 INFO L226 Difference]: Without dead ends: 749 [2021-12-21 12:57:00,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:57:00,245 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1191 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:00,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1780 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 12:57:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-21 12:57:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-21 12:57:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6629711751662972) internal successors, (750), 474 states have internal predecessors, (750), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 945 transitions. [2021-12-21 12:57:00,280 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 945 transitions. Word has length 67 [2021-12-21 12:57:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:00,280 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 945 transitions. [2021-12-21 12:57:00,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 945 transitions. [2021-12-21 12:57:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 12:57:00,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:00,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:00,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 12:57:00,282 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1455824306, now seen corresponding path program 1 times [2021-12-21 12:57:00,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:00,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486032377] [2021-12-21 12:57:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:00,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 12:57:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:00,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486032377] [2021-12-21 12:57:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486032377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:00,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:00,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:57:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933896307] [2021-12-21 12:57:00,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:57:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:57:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:57:00,519 INFO L87 Difference]: Start difference. First operand 577 states and 945 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:03,179 INFO L93 Difference]: Finished difference Result 1264 states and 2104 transitions. [2021-12-21 12:57:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:57:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-12-21 12:57:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:03,184 INFO L225 Difference]: With dead ends: 1264 [2021-12-21 12:57:03,184 INFO L226 Difference]: Without dead ends: 749 [2021-12-21 12:57:03,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:57:03,186 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 739 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:03,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1803 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2123 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 12:57:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-21 12:57:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-21 12:57:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6518847006651884) internal successors, (745), 474 states have internal predecessors, (745), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 940 transitions. [2021-12-21 12:57:03,220 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 940 transitions. Word has length 68 [2021-12-21 12:57:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:03,220 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 940 transitions. [2021-12-21 12:57:03,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 940 transitions. [2021-12-21 12:57:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 12:57:03,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:03,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:03,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 12:57:03,222 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2054400190, now seen corresponding path program 1 times [2021-12-21 12:57:03,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:03,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059344178] [2021-12-21 12:57:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:03,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 12:57:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:03,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:03,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059344178] [2021-12-21 12:57:03,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059344178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:03,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:03,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:57:03,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935782797] [2021-12-21 12:57:03,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:03,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:57:03,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:57:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:57:03,474 INFO L87 Difference]: Start difference. First operand 577 states and 940 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:06,330 INFO L93 Difference]: Finished difference Result 1264 states and 2099 transitions. [2021-12-21 12:57:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:57:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-12-21 12:57:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:06,333 INFO L225 Difference]: With dead ends: 1264 [2021-12-21 12:57:06,333 INFO L226 Difference]: Without dead ends: 749 [2021-12-21 12:57:06,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:57:06,335 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 738 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:06,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1802 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 12:57:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-21 12:57:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-21 12:57:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6407982261640799) internal successors, (740), 474 states have internal predecessors, (740), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 935 transitions. [2021-12-21 12:57:06,370 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 935 transitions. Word has length 69 [2021-12-21 12:57:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:06,370 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 935 transitions. [2021-12-21 12:57:06,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 935 transitions. [2021-12-21 12:57:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-21 12:57:06,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:06,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:06,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 12:57:06,372 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash -171355341, now seen corresponding path program 1 times [2021-12-21 12:57:06,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:06,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625653159] [2021-12-21 12:57:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:06,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 12:57:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:06,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625653159] [2021-12-21 12:57:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625653159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:06,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:06,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:57:06,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341762128] [2021-12-21 12:57:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:06,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:57:06,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:57:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:57:06,684 INFO L87 Difference]: Start difference. First operand 577 states and 935 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:10,886 INFO L93 Difference]: Finished difference Result 1256 states and 2076 transitions. [2021-12-21 12:57:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:57:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-12-21 12:57:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:10,904 INFO L225 Difference]: With dead ends: 1256 [2021-12-21 12:57:10,904 INFO L226 Difference]: Without dead ends: 756 [2021-12-21 12:57:10,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:57:10,908 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 1201 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 4006 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 4006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:10,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 3052 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 4006 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-21 12:57:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-12-21 12:57:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 577. [2021-12-21 12:57:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6385809312638582) internal successors, (739), 474 states have internal predecessors, (739), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 934 transitions. [2021-12-21 12:57:10,990 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 934 transitions. Word has length 70 [2021-12-21 12:57:10,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:10,990 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 934 transitions. [2021-12-21 12:57:10,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 934 transitions. [2021-12-21 12:57:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-21 12:57:10,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:10,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:10,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 12:57:10,992 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1253693971, now seen corresponding path program 1 times [2021-12-21 12:57:10,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:10,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594377396] [2021-12-21 12:57:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:10,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 12:57:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:11,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:11,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594377396] [2021-12-21 12:57:11,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594377396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:11,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:11,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:57:11,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250929498] [2021-12-21 12:57:11,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:11,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:57:11,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:57:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:57:11,287 INFO L87 Difference]: Start difference. First operand 577 states and 934 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, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:14,047 INFO L93 Difference]: Finished difference Result 1264 states and 2091 transitions. [2021-12-21 12:57:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:57:14,048 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, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-12-21 12:57:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:14,052 INFO L225 Difference]: With dead ends: 1264 [2021-12-21 12:57:14,052 INFO L226 Difference]: Without dead ends: 749 [2021-12-21 12:57:14,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:57:14,054 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 1200 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:14,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 1761 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 12:57:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-21 12:57:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-21 12:57:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6274944567627494) internal successors, (734), 474 states have internal predecessors, (734), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 929 transitions. [2021-12-21 12:57:14,095 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 929 transitions. Word has length 70 [2021-12-21 12:57:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:14,095 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 929 transitions. [2021-12-21 12:57:14,096 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, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 929 transitions. [2021-12-21 12:57:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 12:57:14,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:14,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:14,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 12:57:14,097 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:14,097 INFO L85 PathProgramCache]: Analyzing trace with hash -964545663, now seen corresponding path program 1 times [2021-12-21 12:57:14,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:14,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118055894] [2021-12-21 12:57:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:14,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 12:57:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:14,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118055894] [2021-12-21 12:57:14,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118055894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:14,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:14,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:57:14,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443580586] [2021-12-21 12:57:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:14,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:57:14,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:57:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:57:14,365 INFO L87 Difference]: Start difference. First operand 577 states and 929 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:17,624 INFO L93 Difference]: Finished difference Result 1277 states and 2101 transitions. [2021-12-21 12:57:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:57:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2021-12-21 12:57:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:17,628 INFO L225 Difference]: With dead ends: 1277 [2021-12-21 12:57:17,628 INFO L226 Difference]: Without dead ends: 774 [2021-12-21 12:57:17,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:57:17,630 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1208 mSDsluCounter, 2179 mSDsCounter, 0 mSdLazyCounter, 3935 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 3935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:17,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 3000 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 3935 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 12:57:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-21 12:57:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 580. [2021-12-21 12:57:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6211453744493391) internal successors, (736), 477 states have internal predecessors, (736), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 931 transitions. [2021-12-21 12:57:17,718 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 931 transitions. Word has length 71 [2021-12-21 12:57:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:17,718 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 931 transitions. [2021-12-21 12:57:17,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 931 transitions. [2021-12-21 12:57:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 12:57:17,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:17,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:17,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 12:57:17,720 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash -41878237, now seen corresponding path program 1 times [2021-12-21 12:57:17,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800071088] [2021-12-21 12:57:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:17,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 12:57:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:17,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:17,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800071088] [2021-12-21 12:57:17,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800071088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:17,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:17,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:57:17,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106631101] [2021-12-21 12:57:17,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:17,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:57:17,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:17,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:57:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:57:17,949 INFO L87 Difference]: Start difference. First operand 580 states and 931 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:20,201 INFO L93 Difference]: Finished difference Result 1273 states and 2092 transitions. [2021-12-21 12:57:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:57:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2021-12-21 12:57:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:20,204 INFO L225 Difference]: With dead ends: 1273 [2021-12-21 12:57:20,204 INFO L226 Difference]: Without dead ends: 755 [2021-12-21 12:57:20,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:57:20,206 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 1194 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:20,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 1783 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 12:57:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-21 12:57:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 580. [2021-12-21 12:57:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6101321585903083) internal successors, (731), 477 states have internal predecessors, (731), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 926 transitions. [2021-12-21 12:57:20,264 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 926 transitions. Word has length 71 [2021-12-21 12:57:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:20,265 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 926 transitions. [2021-12-21 12:57:20,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 926 transitions. [2021-12-21 12:57:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 12:57:20,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:20,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:20,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 12:57:20,267 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:20,267 INFO L85 PathProgramCache]: Analyzing trace with hash -872008712, now seen corresponding path program 1 times [2021-12-21 12:57:20,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:20,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103041538] [2021-12-21 12:57:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:20,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:57:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:20,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103041538] [2021-12-21 12:57:20,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103041538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:20,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:20,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:57:20,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538955185] [2021-12-21 12:57:20,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:20,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:57:20,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:20,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:57:20,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:57:20,534 INFO L87 Difference]: Start difference. First operand 580 states and 926 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:23,997 INFO L93 Difference]: Finished difference Result 1283 states and 2098 transitions. [2021-12-21 12:57:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:57:24,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-12-21 12:57:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:24,016 INFO L225 Difference]: With dead ends: 1283 [2021-12-21 12:57:24,017 INFO L226 Difference]: Without dead ends: 780 [2021-12-21 12:57:24,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:57:24,019 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 1197 mSDsluCounter, 2206 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 4226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:24,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 3030 Invalid, 4226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 3918 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 12:57:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-12-21 12:57:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 584. [2021-12-21 12:57:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 458 states have (on average 1.6026200873362446) internal successors, (734), 481 states have internal predecessors, (734), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-21 12:57:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 929 transitions. [2021-12-21 12:57:24,105 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 929 transitions. Word has length 72 [2021-12-21 12:57:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:24,106 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 929 transitions. [2021-12-21 12:57:24,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 929 transitions. [2021-12-21 12:57:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 12:57:24,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:24,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:24,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 12:57:24,108 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash 501573080, now seen corresponding path program 1 times [2021-12-21 12:57:24,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:24,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429947301] [2021-12-21 12:57:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:24,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:57:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:24,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:24,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429947301] [2021-12-21 12:57:24,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429947301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:24,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:24,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:57:24,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785958692] [2021-12-21 12:57:24,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:24,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:57:24,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:24,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:57:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:57:24,345 INFO L87 Difference]: Start difference. First operand 584 states and 929 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:27,338 INFO L93 Difference]: Finished difference Result 1321 states and 2137 transitions. [2021-12-21 12:57:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:57:27,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-21 12:57:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:27,342 INFO L225 Difference]: With dead ends: 1321 [2021-12-21 12:57:27,342 INFO L226 Difference]: Without dead ends: 735 [2021-12-21 12:57:27,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:57:27,344 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 669 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:27,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1804 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 12:57:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-12-21 12:57:27,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 565. [2021-12-21 12:57:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.6108597285067874) internal successors, (712), 463 states have internal predecessors, (712), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 12:57:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 903 transitions. [2021-12-21 12:57:27,382 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 903 transitions. Word has length 72 [2021-12-21 12:57:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:27,382 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 903 transitions. [2021-12-21 12:57:27,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:57:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 903 transitions. [2021-12-21 12:57:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 12:57:27,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:27,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:27,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 12:57:27,384 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash 908269926, now seen corresponding path program 1 times [2021-12-21 12:57:27,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:27,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085256350] [2021-12-21 12:57:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:27,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 12:57:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:27,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085256350] [2021-12-21 12:57:27,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085256350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:27,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:27,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:57:27,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848880711] [2021-12-21 12:57:27,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:27,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:57:27,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:27,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:57:27,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:57:27,674 INFO L87 Difference]: Start difference. First operand 565 states and 903 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:31,017 INFO L93 Difference]: Finished difference Result 1256 states and 2052 transitions. [2021-12-21 12:57:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:57:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 73 [2021-12-21 12:57:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:31,023 INFO L225 Difference]: With dead ends: 1256 [2021-12-21 12:57:31,023 INFO L226 Difference]: Without dead ends: 756 [2021-12-21 12:57:31,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:57:31,025 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 718 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:31,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2945 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4003 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 12:57:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-12-21 12:57:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 570. [2021-12-21 12:57:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 447 states have (on average 1.604026845637584) internal successors, (717), 468 states have internal predecessors, (717), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 12:57:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 908 transitions. [2021-12-21 12:57:31,064 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 908 transitions. Word has length 73 [2021-12-21 12:57:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:31,065 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 908 transitions. [2021-12-21 12:57:31,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 12:57:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 908 transitions. [2021-12-21 12:57:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 12:57:31,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:31,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:31,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 12:57:31,066 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash -789981491, now seen corresponding path program 1 times [2021-12-21 12:57:31,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:31,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322848134] [2021-12-21 12:57:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:31,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 12:57:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:57:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:31,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322848134] [2021-12-21 12:57:31,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322848134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:31,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:31,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:57:31,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072973287] [2021-12-21 12:57:31,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:31,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:57:31,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:57:31,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:57:31,389 INFO L87 Difference]: Start difference. First operand 570 states and 908 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 12:57:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:57:37,524 INFO L93 Difference]: Finished difference Result 2072 states and 3474 transitions. [2021-12-21 12:57:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:57:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 74 [2021-12-21 12:57:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:57:37,533 INFO L225 Difference]: With dead ends: 2072 [2021-12-21 12:57:37,533 INFO L226 Difference]: Without dead ends: 1580 [2021-12-21 12:57:37,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:57:37,536 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 4370 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 5194 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4460 SdHoareTripleChecker+Valid, 2681 SdHoareTripleChecker+Invalid, 6503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 5194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:57:37,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4460 Valid, 2681 Invalid, 6503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1309 Valid, 5194 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-21 12:57:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-12-21 12:57:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1088. [2021-12-21 12:57:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 853 states have (on average 1.6389214536928487) internal successors, (1398), 883 states have internal predecessors, (1398), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2021-12-21 12:57:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1780 transitions. [2021-12-21 12:57:37,635 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1780 transitions. Word has length 74 [2021-12-21 12:57:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:57:37,636 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1780 transitions. [2021-12-21 12:57:37,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 12:57:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1780 transitions. [2021-12-21 12:57:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 12:57:37,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:57:37,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:57:37,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 12:57:37,639 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:57:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:57:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash 120536424, now seen corresponding path program 1 times [2021-12-21 12:57:37,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:57:37,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920567240] [2021-12-21 12:57:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:57:37,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:57:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:37,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:57:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:37,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:37,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:57:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:37,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 12:57:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:37,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:57:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:57:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:38,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:57:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:38,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:57:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 12:57:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:38,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 12:57:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 12:57:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:57:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:57:38,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:57:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920567240] [2021-12-21 12:57:38,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920567240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:57:38,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:57:38,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-21 12:57:38,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662348048] [2021-12-21 12:57:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:57:38,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 12:57:38,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:57:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 12:57:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-21 12:57:38,208 INFO L87 Difference]: Start difference. First operand 1088 states and 1780 transitions. Second operand has 18 states, 16 states have (on average 5.4375) internal successors, (87), 10 states have internal predecessors, (87), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12)