/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:13:50,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:13:50,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:13:50,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:13:50,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:13:50,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:13:50,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:13:50,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:13:50,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:13:50,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:13:50,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:13:50,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:13:50,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:13:50,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:13:50,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:13:50,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:13:50,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:13:50,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:13:50,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:13:50,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:13:50,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:13:50,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:13:50,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:13:50,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:13:50,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:13:50,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:13:50,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:13:50,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:13:50,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:13:50,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:13:50,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:13:50,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:13:50,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:13:50,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:13:50,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:13:50,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:13:50,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:13:50,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:13:50,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:13:50,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:13:50,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:13:50,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:13:50,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:13:50,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:13:50,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:13:50,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:13:50,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:13:50,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:13:50,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:13:50,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:13:50,344 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:13:50,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:13:50,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:13:50,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:13:50,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:13:50,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:13:50,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:13:50,345 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:13:50,345 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:13:50,346 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:13:50,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:13:50,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:13:50,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:13:50,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:13:50,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:13:50,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:13:50,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:13:50,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:13:50,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:13:50,347 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:13:50,347 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:13:50,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:13:50,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:13:50,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:13:50,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:13:50,348 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:13:50,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:13:50,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:13:50,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:13:50,603 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:13:50,604 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:13:50,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c [2022-01-10 06:13:50,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bdd0524f/476e0551ccac448a96ccf1ac8ba6c2ff/FLAG0cc7d6890 [2022-01-10 06:13:51,180 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:13:51,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c [2022-01-10 06:13:51,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bdd0524f/476e0551ccac448a96ccf1ac8ba6c2ff/FLAG0cc7d6890 [2022-01-10 06:13:51,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bdd0524f/476e0551ccac448a96ccf1ac8ba6c2ff [2022-01-10 06:13:51,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:13:51,691 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:13:51,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:13:51,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:13:51,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:13:51,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:13:51" (1/1) ... [2022-01-10 06:13:51,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f081a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:51, skipping insertion in model container [2022-01-10 06:13:51,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:13:51" (1/1) ... [2022-01-10 06:13:51,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:13:51,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:13:51,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2022-01-10 06:13:52,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:13:52,170 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:13:52,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:13:52,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2022-01-10 06:13:52,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:13:52,308 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:13:52,333 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2022-01-10 06:13:52,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:13:52,407 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:13:52,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52 WrapperNode [2022-01-10 06:13:52,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:13:52,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:13:52,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:13:52,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:13:52,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,476 INFO L137 Inliner]: procedures = 100, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 869 [2022-01-10 06:13:52,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:13:52,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:13:52,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:13:52,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:13:52,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:13:52,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:13:52,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:13:52,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:13:52,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (1/1) ... [2022-01-10 06:13:52,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:13:52,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:13:52,585 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) [2022-01-10 06:13:52,594 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 [2022-01-10 06:13:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-01-10 06:13:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-01-10 06:13:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:13:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:13:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:13:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:13:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:13:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:13:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:13:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:13:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:13:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:13:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-01-10 06:13:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-01-10 06:13:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-01-10 06:13:52,624 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-01-10 06:13:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:13:52,624 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:13:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:13:52,624 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:13:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-01-10 06:13:52,624 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-01-10 06:13:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-01-10 06:13:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-01-10 06:13:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:13:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:13:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-01-10 06:13:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:13:52,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:13:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:13:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:13:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:13:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:13:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:13:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:13:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:13:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:13:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:13:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:13:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:13:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:13:52,627 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:13:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:13:52,627 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:13:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-01-10 06:13:52,627 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-01-10 06:13:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:13:52,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:13:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:13:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:13:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-01-10 06:13:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-01-10 06:13:52,809 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:13:52,811 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:13:53,720 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:13:53,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:13:53,735 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:13:53,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:13:53 BoogieIcfgContainer [2022-01-10 06:13:53,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:13:53,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:13:53,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:13:53,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:13:53,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:13:51" (1/3) ... [2022-01-10 06:13:53,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702f04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:13:53, skipping insertion in model container [2022-01-10 06:13:53,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:52" (2/3) ... [2022-01-10 06:13:53,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702f04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:13:53, skipping insertion in model container [2022-01-10 06:13:53,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:13:53" (3/3) ... [2022-01-10 06:13:53,748 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product24.cil.c [2022-01-10 06:13:53,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:13:53,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:13:53,800 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:13:53,807 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 [2022-01-10 06:13:53,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:13:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 465 states have (on average 1.6709677419354838) internal successors, (777), 488 states have internal predecessors, (777), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-10 06:13:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:13:53,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:53,858 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:53,859 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash -103685330, now seen corresponding path program 1 times [2022-01-10 06:13:53,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:53,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378496447] [2022-01-10 06:13:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:53,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:53,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:53,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:53,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:13:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:13:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:13:54,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:54,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378496447] [2022-01-10 06:13:54,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378496447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:54,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:54,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:13:54,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359100200] [2022-01-10 06:13:54,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:13:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:13:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:13:54,530 INFO L87 Difference]: Start difference. First operand has 603 states, 465 states have (on average 1.6709677419354838) internal successors, (777), 488 states have internal predecessors, (777), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:13:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:54,587 INFO L93 Difference]: Finished difference Result 624 states and 1023 transitions. [2022-01-10 06:13:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:13:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2022-01-10 06:13:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:54,607 INFO L225 Difference]: With dead ends: 624 [2022-01-10 06:13:54,608 INFO L226 Difference]: Without dead ends: 595 [2022-01-10 06:13:54,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:13:54,614 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:54,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-10 06:13:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2022-01-10 06:13:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 459 states have (on average 1.6688453159041394) internal successors, (766), 480 states have internal predecessors, (766), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:13:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 977 transitions. [2022-01-10 06:13:54,686 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 977 transitions. Word has length 83 [2022-01-10 06:13:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:54,688 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 977 transitions. [2022-01-10 06:13:54,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:13:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 977 transitions. [2022-01-10 06:13:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 06:13:54,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:54,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:54,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:54,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:54,909 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1102022690, now seen corresponding path program 1 times [2022-01-10 06:13:54,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:54,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122904452] [2022-01-10 06:13:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:54,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:54,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:54,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:13:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:55,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:13:55,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:55,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:55,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122904452] [2022-01-10 06:13:55,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122904452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:55,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:55,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:55,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71077578] [2022-01-10 06:13:55,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:55,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:55,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:55,486 INFO L87 Difference]: Start difference. First operand 595 states and 977 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:55,586 INFO L93 Difference]: Finished difference Result 1181 states and 1946 transitions. [2022-01-10 06:13:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2022-01-10 06:13:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:55,594 INFO L225 Difference]: With dead ends: 1181 [2022-01-10 06:13:55,594 INFO L226 Difference]: Without dead ends: 595 [2022-01-10 06:13:55,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:55,603 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 14 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:55,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2882 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-10 06:13:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2022-01-10 06:13:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 459 states have (on average 1.6666666666666667) internal successors, (765), 480 states have internal predecessors, (765), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:13:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 976 transitions. [2022-01-10 06:13:55,630 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 976 transitions. Word has length 85 [2022-01-10 06:13:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:55,630 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 976 transitions. [2022-01-10 06:13:55,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 976 transitions. [2022-01-10 06:13:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:13:55,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:55,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:55,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:55,852 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash -45899462, now seen corresponding path program 1 times [2022-01-10 06:13:55,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:55,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941586282] [2022-01-10 06:13:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:55,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:55,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:55,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:13:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:13:56,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:56,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941586282] [2022-01-10 06:13:56,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941586282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:56,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:56,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:56,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120618861] [2022-01-10 06:13:56,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:56,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:56,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:56,356 INFO L87 Difference]: Start difference. First operand 595 states and 976 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:56,436 INFO L93 Difference]: Finished difference Result 1181 states and 1944 transitions. [2022-01-10 06:13:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:56,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2022-01-10 06:13:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:56,440 INFO L225 Difference]: With dead ends: 1181 [2022-01-10 06:13:56,440 INFO L226 Difference]: Without dead ends: 595 [2022-01-10 06:13:56,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:56,446 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 12 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:56,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2882 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-10 06:13:56,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2022-01-10 06:13:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 459 states have (on average 1.6644880174291938) internal successors, (764), 480 states have internal predecessors, (764), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:13:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 975 transitions. [2022-01-10 06:13:56,496 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 975 transitions. Word has length 87 [2022-01-10 06:13:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:56,497 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 975 transitions. [2022-01-10 06:13:56,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 975 transitions. [2022-01-10 06:13:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:13:56,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:56,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:56,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:56,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:56,699 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1293965662, now seen corresponding path program 1 times [2022-01-10 06:13:56,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:56,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125249442] [2022-01-10 06:13:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:56,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:56,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:56,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:56,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:13:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:57,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:57,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:13:57,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:57,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125249442] [2022-01-10 06:13:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125249442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:57,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:57,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:57,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203881711] [2022-01-10 06:13:57,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:57,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:57,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:57,175 INFO L87 Difference]: Start difference. First operand 595 states and 975 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:57,226 INFO L93 Difference]: Finished difference Result 1185 states and 1947 transitions. [2022-01-10 06:13:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:13:57,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2022-01-10 06:13:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:57,230 INFO L225 Difference]: With dead ends: 1185 [2022-01-10 06:13:57,230 INFO L226 Difference]: Without dead ends: 601 [2022-01-10 06:13:57,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:57,233 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 13 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:57,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2882 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-10 06:13:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2022-01-10 06:13:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 464 states have (on average 1.6573275862068966) internal successors, (769), 485 states have internal predecessors, (769), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:13:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 980 transitions. [2022-01-10 06:13:57,249 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 980 transitions. Word has length 89 [2022-01-10 06:13:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:57,249 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 980 transitions. [2022-01-10 06:13:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 980 transitions. [2022-01-10 06:13:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-10 06:13:57,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:57,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:57,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:13:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:57,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1933603326, now seen corresponding path program 1 times [2022-01-10 06:13:57,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:57,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249028548] [2022-01-10 06:13:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:57,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:57,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:57,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:57,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:13:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:13:57,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:57,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:57,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249028548] [2022-01-10 06:13:57,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249028548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:57,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:57,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:57,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902996419] [2022-01-10 06:13:57,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:57,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:57,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:57,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:57,927 INFO L87 Difference]: Start difference. First operand 601 states and 980 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:57,974 INFO L93 Difference]: Finished difference Result 1184 states and 1938 transitions. [2022-01-10 06:13:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:57,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2022-01-10 06:13:57,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:57,979 INFO L225 Difference]: With dead ends: 1184 [2022-01-10 06:13:57,979 INFO L226 Difference]: Without dead ends: 601 [2022-01-10 06:13:57,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:57,983 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 8 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:57,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2883 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-10 06:13:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2022-01-10 06:13:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 464 states have (on average 1.6551724137931034) internal successors, (768), 485 states have internal predecessors, (768), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:13:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 979 transitions. [2022-01-10 06:13:58,007 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 979 transitions. Word has length 90 [2022-01-10 06:13:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:58,008 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 979 transitions. [2022-01-10 06:13:58,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 979 transitions. [2022-01-10 06:13:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 06:13:58,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:58,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:58,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:58,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:58,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1917731546, now seen corresponding path program 1 times [2022-01-10 06:13:58,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674144268] [2022-01-10 06:13:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:58,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:58,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:58,230 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:58,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:13:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:13:58,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:58,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674144268] [2022-01-10 06:13:58,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674144268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:58,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:58,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:58,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266025503] [2022-01-10 06:13:58,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:58,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:58,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:58,659 INFO L87 Difference]: Start difference. First operand 601 states and 979 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:58,711 INFO L93 Difference]: Finished difference Result 1184 states and 1937 transitions. [2022-01-10 06:13:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:58,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2022-01-10 06:13:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:58,714 INFO L225 Difference]: With dead ends: 1184 [2022-01-10 06:13:58,714 INFO L226 Difference]: Without dead ends: 601 [2022-01-10 06:13:58,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:58,716 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 6 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:58,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2883 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-10 06:13:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2022-01-10 06:13:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 464 states have (on average 1.6530172413793103) internal successors, (767), 485 states have internal predecessors, (767), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:13:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 978 transitions. [2022-01-10 06:13:58,730 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 978 transitions. Word has length 91 [2022-01-10 06:13:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:58,730 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 978 transitions. [2022-01-10 06:13:58,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:13:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 978 transitions. [2022-01-10 06:13:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:13:58,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:58,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:58,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:58,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:58,945 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1876786686, now seen corresponding path program 1 times [2022-01-10 06:13:58,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:58,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129263713] [2022-01-10 06:13:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:58,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:58,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:58,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:13:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:13:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:13:59,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:59,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:59,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129263713] [2022-01-10 06:13:59,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129263713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:59,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:59,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:13:59,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7204122] [2022-01-10 06:13:59,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:59,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:13:59,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:13:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:13:59,364 INFO L87 Difference]: Start difference. First operand 601 states and 978 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:13:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:59,488 INFO L93 Difference]: Finished difference Result 1201 states and 1965 transitions. [2022-01-10 06:13:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:13:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-01-10 06:13:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:59,495 INFO L225 Difference]: With dead ends: 1201 [2022-01-10 06:13:59,496 INFO L226 Difference]: Without dead ends: 622 [2022-01-10 06:13:59,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:59,498 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 148 mSDsluCounter, 4703 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5665 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:59,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5665 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:59,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-10 06:13:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2022-01-10 06:13:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 480 states have (on average 1.6520833333333333) internal successors, (793), 503 states have internal predecessors, (793), 109 states have call successors, (109), 29 states have call predecessors, (109), 30 states have return successors, (107), 101 states have call predecessors, (107), 104 states have call successors, (107) [2022-01-10 06:13:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1009 transitions. [2022-01-10 06:13:59,512 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1009 transitions. Word has length 92 [2022-01-10 06:13:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:59,512 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1009 transitions. [2022-01-10 06:13:59,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:13:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1009 transitions. [2022-01-10 06:13:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:13:59,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:59,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:59,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:59,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:59,727 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1009734461, now seen corresponding path program 1 times [2022-01-10 06:13:59,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:59,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704429970] [2022-01-10 06:13:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:59,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:59,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:59,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:13:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:00,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:14:00,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:00,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:00,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704429970] [2022-01-10 06:14:00,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704429970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:00,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:00,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040565586] [2022-01-10 06:14:00,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:00,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:00,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:00,156 INFO L87 Difference]: Start difference. First operand 620 states and 1009 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:00,200 INFO L93 Difference]: Finished difference Result 1214 states and 1987 transitions. [2022-01-10 06:14:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:14:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2022-01-10 06:14:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:00,204 INFO L225 Difference]: With dead ends: 1214 [2022-01-10 06:14:00,204 INFO L226 Difference]: Without dead ends: 616 [2022-01-10 06:14:00,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:00,207 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 8 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:00,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2882 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-10 06:14:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-10 06:14:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 478 states have (on average 1.6527196652719665) internal successors, (790), 500 states have internal predecessors, (790), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2022-01-10 06:14:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1002 transitions. [2022-01-10 06:14:00,220 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1002 transitions. Word has length 92 [2022-01-10 06:14:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:00,221 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1002 transitions. [2022-01-10 06:14:00,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1002 transitions. [2022-01-10 06:14:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 06:14:00,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:00,222 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:00,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:00,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:00,438 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -38977083, now seen corresponding path program 1 times [2022-01-10 06:14:00,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:00,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913044657] [2022-01-10 06:14:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:00,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:00,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:00,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:14:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:00,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:00,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:00,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913044657] [2022-01-10 06:14:00,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913044657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:00,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:00,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:00,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912492121] [2022-01-10 06:14:00,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:00,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:00,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:00,899 INFO L87 Difference]: Start difference. First operand 616 states and 1002 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:01,043 INFO L93 Difference]: Finished difference Result 1240 states and 2032 transitions. [2022-01-10 06:14:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2022-01-10 06:14:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:01,048 INFO L225 Difference]: With dead ends: 1240 [2022-01-10 06:14:01,049 INFO L226 Difference]: Without dead ends: 616 [2022-01-10 06:14:01,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:01,052 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 134 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:01,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2690 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-10 06:14:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-10 06:14:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 478 states have (on average 1.6422594142259415) internal successors, (785), 500 states have internal predecessors, (785), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2022-01-10 06:14:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 997 transitions. [2022-01-10 06:14:01,069 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 997 transitions. Word has length 93 [2022-01-10 06:14:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:01,070 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 997 transitions. [2022-01-10 06:14:01,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 997 transitions. [2022-01-10 06:14:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-10 06:14:01,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:01,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:01,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:01,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:01,288 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1191444093, now seen corresponding path program 1 times [2022-01-10 06:14:01,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:01,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369755625] [2022-01-10 06:14:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:01,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:01,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:01,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:14:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:01,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:01,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:01,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369755625] [2022-01-10 06:14:01,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369755625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:01,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:01,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:01,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906861744] [2022-01-10 06:14:01,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:01,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:01,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:01,746 INFO L87 Difference]: Start difference. First operand 616 states and 997 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:01,859 INFO L93 Difference]: Finished difference Result 1240 states and 2022 transitions. [2022-01-10 06:14:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2022-01-10 06:14:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:01,863 INFO L225 Difference]: With dead ends: 1240 [2022-01-10 06:14:01,864 INFO L226 Difference]: Without dead ends: 616 [2022-01-10 06:14:01,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:01,866 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 128 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:01,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2690 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-10 06:14:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-10 06:14:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 478 states have (on average 1.6317991631799162) internal successors, (780), 500 states have internal predecessors, (780), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2022-01-10 06:14:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 992 transitions. [2022-01-10 06:14:01,879 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 992 transitions. Word has length 95 [2022-01-10 06:14:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:01,879 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 992 transitions. [2022-01-10 06:14:01,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 992 transitions. [2022-01-10 06:14:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:14:01,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:01,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:01,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:02,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:02,094 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash -277084251, now seen corresponding path program 1 times [2022-01-10 06:14:02,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:02,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276342422] [2022-01-10 06:14:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:02,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:02,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:02,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:14:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:02,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:02,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:02,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276342422] [2022-01-10 06:14:02,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276342422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:02,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:02,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:02,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961917676] [2022-01-10 06:14:02,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:02,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:02,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:02,560 INFO L87 Difference]: Start difference. First operand 616 states and 992 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:02,678 INFO L93 Difference]: Finished difference Result 1261 states and 2043 transitions. [2022-01-10 06:14:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:14:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2022-01-10 06:14:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:02,685 INFO L225 Difference]: With dead ends: 1261 [2022-01-10 06:14:02,685 INFO L226 Difference]: Without dead ends: 646 [2022-01-10 06:14:02,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:02,688 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 143 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2700 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:02,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2700 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-10 06:14:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 631. [2022-01-10 06:14:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 493 states have (on average 1.6125760649087222) internal successors, (795), 514 states have internal predecessors, (795), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1006 transitions. [2022-01-10 06:14:02,704 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1006 transitions. Word has length 97 [2022-01-10 06:14:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:02,704 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1006 transitions. [2022-01-10 06:14:02,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1006 transitions. [2022-01-10 06:14:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:14:02,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:02,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:02,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:02,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:02,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash -400958683, now seen corresponding path program 1 times [2022-01-10 06:14:02,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:02,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850195646] [2022-01-10 06:14:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:02,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:02,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:02,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:14:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:14:03,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:03,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:03,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850195646] [2022-01-10 06:14:03,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850195646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:03,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:03,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:03,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152272644] [2022-01-10 06:14:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:03,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:03,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:03,399 INFO L87 Difference]: Start difference. First operand 631 states and 1006 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:03,523 INFO L93 Difference]: Finished difference Result 1225 states and 1964 transitions. [2022-01-10 06:14:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2022-01-10 06:14:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:03,528 INFO L225 Difference]: With dead ends: 1225 [2022-01-10 06:14:03,528 INFO L226 Difference]: Without dead ends: 625 [2022-01-10 06:14:03,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:03,532 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 131 mSDsluCounter, 4668 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5633 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:03,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5633 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-10 06:14:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 610. [2022-01-10 06:14:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 472 states have (on average 1.6059322033898304) internal successors, (758), 493 states have internal predecessors, (758), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 969 transitions. [2022-01-10 06:14:03,549 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 969 transitions. Word has length 97 [2022-01-10 06:14:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:03,550 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 969 transitions. [2022-01-10 06:14:03,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 969 transitions. [2022-01-10 06:14:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:14:03,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:03,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:03,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:03,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:03,768 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash 927104863, now seen corresponding path program 1 times [2022-01-10 06:14:03,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:03,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268974867] [2022-01-10 06:14:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:03,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:03,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:03,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:03,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:14:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:04,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:04,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:04,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268974867] [2022-01-10 06:14:04,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268974867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:04,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:04,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:04,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314302660] [2022-01-10 06:14:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:04,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:04,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:04,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:04,147 INFO L87 Difference]: Start difference. First operand 610 states and 969 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:04,228 INFO L93 Difference]: Finished difference Result 1189 states and 1902 transitions. [2022-01-10 06:14:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2022-01-10 06:14:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:04,239 INFO L225 Difference]: With dead ends: 1189 [2022-01-10 06:14:04,240 INFO L226 Difference]: Without dead ends: 610 [2022-01-10 06:14:04,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:04,242 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 69 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:04,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2714 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-10 06:14:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2022-01-10 06:14:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 472 states have (on average 1.603813559322034) internal successors, (757), 493 states have internal predecessors, (757), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 968 transitions. [2022-01-10 06:14:04,253 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 968 transitions. Word has length 98 [2022-01-10 06:14:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:04,253 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 968 transitions. [2022-01-10 06:14:04,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 968 transitions. [2022-01-10 06:14:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:14:04,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:04,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:04,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:04,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:04,467 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash 78438912, now seen corresponding path program 1 times [2022-01-10 06:14:04,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:04,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518776088] [2022-01-10 06:14:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:04,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:04,469 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:04,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:14:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:04,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:04,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:04,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:04,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518776088] [2022-01-10 06:14:04,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518776088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:04,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:04,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:04,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676381352] [2022-01-10 06:14:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:04,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:04,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:04,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:04,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:04,848 INFO L87 Difference]: Start difference. First operand 610 states and 968 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:04,926 INFO L93 Difference]: Finished difference Result 1189 states and 1901 transitions. [2022-01-10 06:14:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:04,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2022-01-10 06:14:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:04,932 INFO L225 Difference]: With dead ends: 1189 [2022-01-10 06:14:04,933 INFO L226 Difference]: Without dead ends: 610 [2022-01-10 06:14:04,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:04,935 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 67 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:04,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2714 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-10 06:14:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2022-01-10 06:14:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 472 states have (on average 1.6016949152542372) internal successors, (756), 493 states have internal predecessors, (756), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 967 transitions. [2022-01-10 06:14:04,954 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 967 transitions. Word has length 99 [2022-01-10 06:14:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:04,955 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 967 transitions. [2022-01-10 06:14:04,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:14:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 967 transitions. [2022-01-10 06:14:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 06:14:04,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:04,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:04,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:05,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:05,169 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:05,170 INFO L85 PathProgramCache]: Analyzing trace with hash 15775386, now seen corresponding path program 1 times [2022-01-10 06:14:05,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:05,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109607425] [2022-01-10 06:14:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:05,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:05,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:05,171 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:05,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:14:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:14:05,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:05,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:05,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:05,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109607425] [2022-01-10 06:14:05,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109607425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:05,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:05,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:05,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747013984] [2022-01-10 06:14:05,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:05,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:05,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:05,638 INFO L87 Difference]: Start difference. First operand 610 states and 967 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:05,787 INFO L93 Difference]: Finished difference Result 1194 states and 1908 transitions. [2022-01-10 06:14:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:14:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2022-01-10 06:14:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:05,791 INFO L225 Difference]: With dead ends: 1194 [2022-01-10 06:14:05,791 INFO L226 Difference]: Without dead ends: 621 [2022-01-10 06:14:05,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:14:05,795 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 109 mSDsluCounter, 5390 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6299 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:05,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6299 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-10 06:14:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 612. [2022-01-10 06:14:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 474 states have (on average 1.5970464135021096) internal successors, (757), 495 states have internal predecessors, (757), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 968 transitions. [2022-01-10 06:14:05,807 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 968 transitions. Word has length 100 [2022-01-10 06:14:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:05,807 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 968 transitions. [2022-01-10 06:14:05,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 968 transitions. [2022-01-10 06:14:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 06:14:05,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:05,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:05,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:06,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:06,022 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash 408498571, now seen corresponding path program 1 times [2022-01-10 06:14:06,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:06,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799181483] [2022-01-10 06:14:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:06,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:06,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:06,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:14:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:14:06,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:06,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:06,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:06,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799181483] [2022-01-10 06:14:06,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799181483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:06,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:06,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:06,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038229453] [2022-01-10 06:14:06,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:06,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:06,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:06,491 INFO L87 Difference]: Start difference. First operand 612 states and 968 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:06,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:06,632 INFO L93 Difference]: Finished difference Result 1186 states and 1889 transitions. [2022-01-10 06:14:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:14:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2022-01-10 06:14:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:06,636 INFO L225 Difference]: With dead ends: 1186 [2022-01-10 06:14:06,637 INFO L226 Difference]: Without dead ends: 617 [2022-01-10 06:14:06,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:14:06,639 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 77 mSDsluCounter, 5396 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6307 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:06,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6307 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-10 06:14:06,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 614. [2022-01-10 06:14:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 476 states have (on average 1.5924369747899159) internal successors, (758), 497 states have internal predecessors, (758), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 969 transitions. [2022-01-10 06:14:06,651 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 969 transitions. Word has length 101 [2022-01-10 06:14:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:06,651 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 969 transitions. [2022-01-10 06:14:06,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 969 transitions. [2022-01-10 06:14:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 06:14:06,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:06,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:06,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:06,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:06,867 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1582710652, now seen corresponding path program 1 times [2022-01-10 06:14:06,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:06,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459839884] [2022-01-10 06:14:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:06,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:06,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:06,869 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:06,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:14:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:14:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:14:07,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:07,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:07,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459839884] [2022-01-10 06:14:07,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459839884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:07,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:07,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:07,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901726664] [2022-01-10 06:14:07,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:07,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:07,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:07,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:07,341 INFO L87 Difference]: Start difference. First operand 614 states and 969 transitions. Second operand has 7 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:07,466 INFO L93 Difference]: Finished difference Result 1132 states and 1816 transitions. [2022-01-10 06:14:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2022-01-10 06:14:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:07,473 INFO L225 Difference]: With dead ends: 1132 [2022-01-10 06:14:07,473 INFO L226 Difference]: Without dead ends: 607 [2022-01-10 06:14:07,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:07,476 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 55 mSDsluCounter, 4548 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5471 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:07,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 5471 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-10 06:14:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2022-01-10 06:14:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 469 states have (on average 1.5991471215351811) internal successors, (750), 490 states have internal predecessors, (750), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 961 transitions. [2022-01-10 06:14:07,496 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 961 transitions. Word has length 102 [2022-01-10 06:14:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:07,496 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 961 transitions. [2022-01-10 06:14:07,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 961 transitions. [2022-01-10 06:14:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:14:07,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:07,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:07,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:14:07,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:07,731 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 926278569, now seen corresponding path program 1 times [2022-01-10 06:14:07,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:07,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850863270] [2022-01-10 06:14:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:07,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:07,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:07,733 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:14:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:08,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:14:08,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:14:08,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:08,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850863270] [2022-01-10 06:14:08,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850863270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:08,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:08,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:08,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109443259] [2022-01-10 06:14:08,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:08,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:08,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:08,189 INFO L87 Difference]: Start difference. First operand 607 states and 961 transitions. Second operand has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:08,306 INFO L93 Difference]: Finished difference Result 1137 states and 1830 transitions. [2022-01-10 06:14:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-01-10 06:14:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:08,310 INFO L225 Difference]: With dead ends: 1137 [2022-01-10 06:14:08,310 INFO L226 Difference]: Without dead ends: 604 [2022-01-10 06:14:08,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:08,312 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 97 mSDsluCounter, 4516 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 5431 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:08,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 5431 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-10 06:14:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2022-01-10 06:14:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 466 states have (on average 1.5987124463519313) internal successors, (745), 487 states have internal predecessors, (745), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 956 transitions. [2022-01-10 06:14:08,323 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 956 transitions. Word has length 103 [2022-01-10 06:14:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:08,323 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 956 transitions. [2022-01-10 06:14:08,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 956 transitions. [2022-01-10 06:14:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:14:08,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:08,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:08,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:14:08,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:08,538 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash 748494889, now seen corresponding path program 1 times [2022-01-10 06:14:08,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914701599] [2022-01-10 06:14:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:08,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:08,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:08,547 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:08,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:14:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:08,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:14:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:14:08,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:08,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914701599] [2022-01-10 06:14:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914701599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:08,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:08,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:08,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336242835] [2022-01-10 06:14:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:08,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:08,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:08,966 INFO L87 Difference]: Start difference. First operand 604 states and 956 transitions. Second operand has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:09,049 INFO L93 Difference]: Finished difference Result 1134 states and 1825 transitions. [2022-01-10 06:14:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-01-10 06:14:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:09,053 INFO L225 Difference]: With dead ends: 1134 [2022-01-10 06:14:09,053 INFO L226 Difference]: Without dead ends: 596 [2022-01-10 06:14:09,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:09,069 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 105 mSDsluCounter, 4507 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5421 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:09,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5421 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-10 06:14:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-01-10 06:14:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 458 states have (on average 1.6026200873362446) internal successors, (734), 479 states have internal predecessors, (734), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 945 transitions. [2022-01-10 06:14:09,081 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 945 transitions. Word has length 103 [2022-01-10 06:14:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:09,081 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 945 transitions. [2022-01-10 06:14:09,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 945 transitions. [2022-01-10 06:14:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:14:09,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:09,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:09,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:14:09,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:09,296 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 298417992, now seen corresponding path program 1 times [2022-01-10 06:14:09,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:09,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437216210] [2022-01-10 06:14:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:09,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:09,298 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:09,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:14:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:14:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:14:09,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:09,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437216210] [2022-01-10 06:14:09,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437216210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:09,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:09,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:09,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775761469] [2022-01-10 06:14:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:09,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:09,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:09,720 INFO L87 Difference]: Start difference. First operand 596 states and 945 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:09,836 INFO L93 Difference]: Finished difference Result 1120 states and 1803 transitions. [2022-01-10 06:14:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:14:09,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 104 [2022-01-10 06:14:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:09,840 INFO L225 Difference]: With dead ends: 1120 [2022-01-10 06:14:09,840 INFO L226 Difference]: Without dead ends: 596 [2022-01-10 06:14:09,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:14:09,842 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 67 mSDsluCounter, 5374 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6284 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:09,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 6284 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-10 06:14:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-01-10 06:14:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 458 states have (on average 1.6004366812227073) internal successors, (733), 479 states have internal predecessors, (733), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 944 transitions. [2022-01-10 06:14:09,862 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 944 transitions. Word has length 104 [2022-01-10 06:14:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 944 transitions. [2022-01-10 06:14:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 944 transitions. [2022-01-10 06:14:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 06:14:09,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:09,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:09,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:10,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:10,071 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2028231673, now seen corresponding path program 1 times [2022-01-10 06:14:10,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122944487] [2022-01-10 06:14:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:10,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:10,073 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:10,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:14:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:14:10,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:14:10,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:10,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122944487] [2022-01-10 06:14:10,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122944487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:10,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:10,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:10,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326320] [2022-01-10 06:14:10,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:10,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:10,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:10,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:10,469 INFO L87 Difference]: Start difference. First operand 596 states and 944 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:10,589 INFO L93 Difference]: Finished difference Result 1164 states and 1860 transitions. [2022-01-10 06:14:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:14:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 105 [2022-01-10 06:14:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:10,593 INFO L225 Difference]: With dead ends: 1164 [2022-01-10 06:14:10,593 INFO L226 Difference]: Without dead ends: 593 [2022-01-10 06:14:10,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:14:10,595 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 101 mSDsluCounter, 5331 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6229 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:10,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6229 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-10 06:14:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-01-10 06:14:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 455 states have (on average 1.5934065934065933) internal successors, (725), 476 states have internal predecessors, (725), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 936 transitions. [2022-01-10 06:14:10,606 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 936 transitions. Word has length 105 [2022-01-10 06:14:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:10,606 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 936 transitions. [2022-01-10 06:14:10,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 936 transitions. [2022-01-10 06:14:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 06:14:10,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:10,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:10,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-01-10 06:14:10,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:10,820 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 911556845, now seen corresponding path program 1 times [2022-01-10 06:14:10,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:10,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997221582] [2022-01-10 06:14:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:10,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:10,822 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:10,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:14:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:14:11,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:14:11,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:11,250 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997221582] [2022-01-10 06:14:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997221582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:11,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:11,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292559985] [2022-01-10 06:14:11,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:11,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:11,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:11,251 INFO L87 Difference]: Start difference. First operand 593 states and 936 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:11,359 INFO L93 Difference]: Finished difference Result 1111 states and 1783 transitions. [2022-01-10 06:14:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:14:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2022-01-10 06:14:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:11,362 INFO L225 Difference]: With dead ends: 1111 [2022-01-10 06:14:11,362 INFO L226 Difference]: Without dead ends: 593 [2022-01-10 06:14:11,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:14:11,364 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 50 mSDsluCounter, 5340 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 6239 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:11,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 6239 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-10 06:14:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-01-10 06:14:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 455 states have (on average 1.591208791208791) internal successors, (724), 476 states have internal predecessors, (724), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 935 transitions. [2022-01-10 06:14:11,375 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 935 transitions. Word has length 106 [2022-01-10 06:14:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:11,375 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 935 transitions. [2022-01-10 06:14:11,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 935 transitions. [2022-01-10 06:14:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 06:14:11,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:11,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:11,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:11,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:11,589 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:11,589 INFO L85 PathProgramCache]: Analyzing trace with hash 996592632, now seen corresponding path program 1 times [2022-01-10 06:14:11,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:11,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81842683] [2022-01-10 06:14:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:11,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:11,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:11,597 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:11,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:14:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:14:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:14:11,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:11,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:11,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81842683] [2022-01-10 06:14:11,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81842683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:11,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:11,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:11,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543743103] [2022-01-10 06:14:11,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:11,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:11,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:11,998 INFO L87 Difference]: Start difference. First operand 593 states and 935 transitions. Second operand has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:12,110 INFO L93 Difference]: Finished difference Result 1149 states and 1828 transitions. [2022-01-10 06:14:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:14:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2022-01-10 06:14:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:12,113 INFO L225 Difference]: With dead ends: 1149 [2022-01-10 06:14:12,114 INFO L226 Difference]: Without dead ends: 590 [2022-01-10 06:14:12,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:14:12,116 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 69 mSDsluCounter, 5326 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6223 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:12,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 6223 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-10 06:14:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-01-10 06:14:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 452 states have (on average 1.584070796460177) internal successors, (716), 473 states have internal predecessors, (716), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-10 06:14:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 927 transitions. [2022-01-10 06:14:12,126 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 927 transitions. Word has length 107 [2022-01-10 06:14:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:12,126 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 927 transitions. [2022-01-10 06:14:12,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 927 transitions. [2022-01-10 06:14:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:14:12,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:12,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:12,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:12,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:12,343 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1750632110, now seen corresponding path program 1 times [2022-01-10 06:14:12,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414242479] [2022-01-10 06:14:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:12,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:12,345 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:12,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:14:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:12,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:14:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:14:13,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:13,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:13,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414242479] [2022-01-10 06:14:13,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414242479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:13,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:13,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:14:13,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396449162] [2022-01-10 06:14:13,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:13,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:13,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:13,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:13,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:13,063 INFO L87 Difference]: Start difference. First operand 590 states and 927 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:16,203 INFO L93 Difference]: Finished difference Result 2225 states and 3643 transitions. [2022-01-10 06:14:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:14:16,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2022-01-10 06:14:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:16,211 INFO L225 Difference]: With dead ends: 2225 [2022-01-10 06:14:16,212 INFO L226 Difference]: Without dead ends: 1715 [2022-01-10 06:14:16,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:16,222 INFO L933 BasicCegarLoop]: 1595 mSDtfsCounter, 3441 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 823 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:16,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 2476 Invalid, 3408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [823 Valid, 2585 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 06:14:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-01-10 06:14:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1528. [2022-01-10 06:14:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1185 states have (on average 1.6379746835443039) internal successors, (1941), 1224 states have internal predecessors, (1941), 275 states have call successors, (275), 66 states have call predecessors, (275), 67 states have return successors, (280), 252 states have call predecessors, (280), 270 states have call successors, (280) [2022-01-10 06:14:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2496 transitions. [2022-01-10 06:14:16,260 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2496 transitions. Word has length 108 [2022-01-10 06:14:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:16,261 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 2496 transitions. [2022-01-10 06:14:16,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:14:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2496 transitions. [2022-01-10 06:14:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-10 06:14:16,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:16,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:16,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:16,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:16,477 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1970892828, now seen corresponding path program 1 times [2022-01-10 06:14:16,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:16,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506694549] [2022-01-10 06:14:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:16,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:16,478 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:16,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:14:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:16,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:14:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:14:17,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:17,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506694549] [2022-01-10 06:14:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506694549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:17,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:17,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:17,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883064992] [2022-01-10 06:14:17,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:17,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:14:17,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:14:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:17,067 INFO L87 Difference]: Start difference. First operand 1528 states and 2496 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:17,603 INFO L93 Difference]: Finished difference Result 2988 states and 5004 transitions. [2022-01-10 06:14:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:14:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 163 [2022-01-10 06:14:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:17,610 INFO L225 Difference]: With dead ends: 2988 [2022-01-10 06:14:17,610 INFO L226 Difference]: Without dead ends: 1540 [2022-01-10 06:14:17,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:14:17,616 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 819 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:17,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 2259 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:14:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-01-10 06:14:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1540. [2022-01-10 06:14:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1194 states have (on average 1.6331658291457287) internal successors, (1950), 1233 states have internal predecessors, (1950), 275 states have call successors, (275), 69 states have call predecessors, (275), 70 states have return successors, (283), 252 states have call predecessors, (283), 270 states have call successors, (283) [2022-01-10 06:14:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2508 transitions. [2022-01-10 06:14:17,653 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2508 transitions. Word has length 163 [2022-01-10 06:14:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:17,654 INFO L470 AbstractCegarLoop]: Abstraction has 1540 states and 2508 transitions. [2022-01-10 06:14:17,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2508 transitions. [2022-01-10 06:14:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 06:14:17,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:17,661 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:17,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:17,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:17,875 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1035340558, now seen corresponding path program 1 times [2022-01-10 06:14:17,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:17,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639968889] [2022-01-10 06:14:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:17,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:17,877 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:17,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:14:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:14:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:14:18,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:18,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:18,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639968889] [2022-01-10 06:14:18,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639968889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:18,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:18,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:18,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123027116] [2022-01-10 06:14:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:18,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:14:18,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:14:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:18,430 INFO L87 Difference]: Start difference. First operand 1540 states and 2508 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:19,005 INFO L93 Difference]: Finished difference Result 3015 states and 5025 transitions. [2022-01-10 06:14:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:14:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 165 [2022-01-10 06:14:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:19,012 INFO L225 Difference]: With dead ends: 3015 [2022-01-10 06:14:19,012 INFO L226 Difference]: Without dead ends: 1555 [2022-01-10 06:14:19,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:14:19,018 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 819 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:19,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 2260 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:14:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2022-01-10 06:14:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2022-01-10 06:14:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1206 states have (on average 1.626865671641791) internal successors, (1962), 1245 states have internal predecessors, (1962), 275 states have call successors, (275), 72 states have call predecessors, (275), 73 states have return successors, (286), 252 states have call predecessors, (286), 270 states have call successors, (286) [2022-01-10 06:14:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2523 transitions. [2022-01-10 06:14:19,054 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2523 transitions. Word has length 165 [2022-01-10 06:14:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:19,055 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 2523 transitions. [2022-01-10 06:14:19,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2523 transitions. [2022-01-10 06:14:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 06:14:19,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:19,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:19,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:19,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:19,260 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash 670317177, now seen corresponding path program 1 times [2022-01-10 06:14:19,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:19,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006825492] [2022-01-10 06:14:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:19,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:19,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:19,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:14:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:14:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:14:19,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:19,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:19,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006825492] [2022-01-10 06:14:19,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006825492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:19,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:19,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:19,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475437351] [2022-01-10 06:14:19,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:19,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:19,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:19,840 INFO L87 Difference]: Start difference. First operand 1555 states and 2523 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-01-10 06:14:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:23,724 INFO L93 Difference]: Finished difference Result 4763 states and 7747 transitions. [2022-01-10 06:14:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:14:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 166 [2022-01-10 06:14:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:23,740 INFO L225 Difference]: With dead ends: 4763 [2022-01-10 06:14:23,740 INFO L226 Difference]: Without dead ends: 3288 [2022-01-10 06:14:23,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:14:23,745 INFO L933 BasicCegarLoop]: 1414 mSDtfsCounter, 2055 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 5568 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2144 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 6328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 5568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:23,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2144 Valid, 3364 Invalid, 6328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 5568 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-10 06:14:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-01-10 06:14:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3103. [2022-01-10 06:14:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 2313 states have (on average 1.5862516212710764) internal successors, (3669), 2399 states have internal predecessors, (3669), 637 states have call successors, (637), 134 states have call predecessors, (637), 152 states have return successors, (681), 602 states have call predecessors, (681), 632 states have call successors, (681) [2022-01-10 06:14:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 4987 transitions. [2022-01-10 06:14:23,832 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 4987 transitions. Word has length 166 [2022-01-10 06:14:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:23,833 INFO L470 AbstractCegarLoop]: Abstraction has 3103 states and 4987 transitions. [2022-01-10 06:14:23,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-01-10 06:14:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 4987 transitions. [2022-01-10 06:14:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 06:14:23,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:23,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:23,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:24,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:24,051 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1738139996, now seen corresponding path program 1 times [2022-01-10 06:14:24,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558110483] [2022-01-10 06:14:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:24,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:24,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:24,053 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:24,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:14:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:24,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:14:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:14:24,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:24,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:24,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558110483] [2022-01-10 06:14:24,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558110483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:24,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:24,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:24,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031139096] [2022-01-10 06:14:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:14:24,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:14:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:24,594 INFO L87 Difference]: Start difference. First operand 3103 states and 4987 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:25,169 INFO L93 Difference]: Finished difference Result 6180 states and 10103 transitions. [2022-01-10 06:14:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:14:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 167 [2022-01-10 06:14:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:25,181 INFO L225 Difference]: With dead ends: 6180 [2022-01-10 06:14:25,181 INFO L226 Difference]: Without dead ends: 3157 [2022-01-10 06:14:25,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:14:25,189 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 832 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:25,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 2260 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:14:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-01-10 06:14:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3157. [2022-01-10 06:14:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 2358 states have (on average 1.575063613231552) internal successors, (3714), 2444 states have internal predecessors, (3714), 637 states have call successors, (637), 143 states have call predecessors, (637), 161 states have return successors, (688), 602 states have call predecessors, (688), 632 states have call successors, (688) [2022-01-10 06:14:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 5039 transitions. [2022-01-10 06:14:25,272 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 5039 transitions. Word has length 167 [2022-01-10 06:14:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:25,272 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 5039 transitions. [2022-01-10 06:14:25,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 5039 transitions. [2022-01-10 06:14:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 06:14:25,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:25,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:25,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:25,487 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1220737578, now seen corresponding path program 1 times [2022-01-10 06:14:25,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633806408] [2022-01-10 06:14:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:25,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:25,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:25,489 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:25,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:14:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:14:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:14:26,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:26,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633806408] [2022-01-10 06:14:26,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633806408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:26,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:26,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:26,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532882543] [2022-01-10 06:14:26,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:26,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:14:26,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:14:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:26,043 INFO L87 Difference]: Start difference. First operand 3157 states and 5039 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:26,635 INFO L93 Difference]: Finished difference Result 6297 states and 10209 transitions. [2022-01-10 06:14:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:14:26,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 169 [2022-01-10 06:14:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:26,652 INFO L225 Difference]: With dead ends: 6297 [2022-01-10 06:14:26,652 INFO L226 Difference]: Without dead ends: 3220 [2022-01-10 06:14:26,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:14:26,661 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 829 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:26,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 2260 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:14:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-01-10 06:14:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3220. [2022-01-10 06:14:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3220 states, 2412 states have (on average 1.5621890547263682) internal successors, (3768), 2498 states have internal predecessors, (3768), 637 states have call successors, (637), 152 states have call predecessors, (637), 170 states have return successors, (695), 602 states have call predecessors, (695), 632 states have call successors, (695) [2022-01-10 06:14:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 5100 transitions. [2022-01-10 06:14:26,748 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 5100 transitions. Word has length 169 [2022-01-10 06:14:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:26,749 INFO L470 AbstractCegarLoop]: Abstraction has 3220 states and 5100 transitions. [2022-01-10 06:14:26,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:14:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 5100 transitions. [2022-01-10 06:14:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-10 06:14:26,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:26,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:26,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:26,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:26,966 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1050267804, now seen corresponding path program 1 times [2022-01-10 06:14:26,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:26,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958714757] [2022-01-10 06:14:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:26,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:26,968 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:26,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:14:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 06:14:27,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:14:27,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:14:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:14:28,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958714757] [2022-01-10 06:14:28,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958714757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:14:28,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:14:28,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-01-10 06:14:28,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510571107] [2022-01-10 06:14:28,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:14:28,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:14:28,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:14:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:14:28,611 INFO L87 Difference]: Start difference. First operand 3220 states and 5100 transitions. Second operand has 18 states, 18 states have (on average 11.0) internal successors, (198), 14 states have internal predecessors, (198), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:14:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:35,223 INFO L93 Difference]: Finished difference Result 11066 states and 17989 transitions. [2022-01-10 06:14:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:14:35,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.0) internal successors, (198), 14 states have internal predecessors, (198), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) Word has length 171 [2022-01-10 06:14:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:35,254 INFO L225 Difference]: With dead ends: 11066 [2022-01-10 06:14:35,254 INFO L226 Difference]: Without dead ends: 7926 [2022-01-10 06:14:35,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:14:35,268 INFO L933 BasicCegarLoop]: 1756 mSDtfsCounter, 5976 mSDsluCounter, 5125 mSDsCounter, 0 mSdLazyCounter, 10166 mSolverCounterSat, 2447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6062 SdHoareTripleChecker+Valid, 6881 SdHoareTripleChecker+Invalid, 12613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2447 IncrementalHoareTripleChecker+Valid, 10166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:35,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6062 Valid, 6881 Invalid, 12613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2447 Valid, 10166 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-10 06:14:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2022-01-10 06:14:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 7072. [2022-01-10 06:14:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 5247 states have (on average 1.5620354488279016) internal successors, (8196), 5432 states have internal predecessors, (8196), 1450 states have call successors, (1450), 297 states have call predecessors, (1450), 374 states have return successors, (1713), 1423 states have call predecessors, (1713), 1445 states have call successors, (1713) [2022-01-10 06:14:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 11359 transitions. [2022-01-10 06:14:35,499 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 11359 transitions. Word has length 171 [2022-01-10 06:14:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:35,500 INFO L470 AbstractCegarLoop]: Abstraction has 7072 states and 11359 transitions. [2022-01-10 06:14:35,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.0) internal successors, (198), 14 states have internal predecessors, (198), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:14:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 11359 transitions. [2022-01-10 06:14:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-10 06:14:35,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:35,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:35,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:35,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:35,720 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:35,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1553570921, now seen corresponding path program 1 times [2022-01-10 06:14:35,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:35,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935280984] [2022-01-10 06:14:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:35,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:35,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:35,722 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:35,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:14:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:14:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:14:36,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:36,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935280984] [2022-01-10 06:14:36,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935280984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:36,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:36,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:36,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74682567] [2022-01-10 06:14:36,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:36,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:36,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:36,274 INFO L87 Difference]: Start difference. First operand 7072 states and 11359 transitions. Second operand has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:14:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:36,481 INFO L93 Difference]: Finished difference Result 10185 states and 16316 transitions. [2022-01-10 06:14:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:14:36,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 173 [2022-01-10 06:14:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:36,492 INFO L225 Difference]: With dead ends: 10185 [2022-01-10 06:14:36,493 INFO L226 Difference]: Without dead ends: 3183 [2022-01-10 06:14:36,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:14:36,507 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 69 mSDsluCounter, 5272 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6160 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:36,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 6160 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2022-01-10 06:14:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 3183. [2022-01-10 06:14:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2389 states have (on average 1.560485558811218) internal successors, (3728), 2475 states have internal predecessors, (3728), 623 states have call successors, (623), 152 states have call predecessors, (623), 170 states have return successors, (681), 588 states have call predecessors, (681), 618 states have call successors, (681) [2022-01-10 06:14:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 5032 transitions. [2022-01-10 06:14:36,586 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 5032 transitions. Word has length 173 [2022-01-10 06:14:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:36,586 INFO L470 AbstractCegarLoop]: Abstraction has 3183 states and 5032 transitions. [2022-01-10 06:14:36,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:14:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 5032 transitions. [2022-01-10 06:14:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-10 06:14:36,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:36,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:36,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 06:14:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:36,803 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash -343704653, now seen corresponding path program 1 times [2022-01-10 06:14:36,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989314746] [2022-01-10 06:14:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:36,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:36,805 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:36,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:14:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:37,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:14:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 06:14:37,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:14:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:14:38,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:38,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989314746] [2022-01-10 06:14:38,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989314746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:14:38,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:14:38,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:14:38,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571864841] [2022-01-10 06:14:38,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:14:38,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:14:38,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:14:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:14:38,342 INFO L87 Difference]: Start difference. First operand 3183 states and 5032 transitions. Second operand has 14 states, 14 states have (on average 14.285714285714286) internal successors, (200), 12 states have internal predecessors, (200), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:14:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:40,679 INFO L93 Difference]: Finished difference Result 6341 states and 10111 transitions. [2022-01-10 06:14:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:40,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.285714285714286) internal successors, (200), 12 states have internal predecessors, (200), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) Word has length 179 [2022-01-10 06:14:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:40,689 INFO L225 Difference]: With dead ends: 6341 [2022-01-10 06:14:40,690 INFO L226 Difference]: Without dead ends: 3236 [2022-01-10 06:14:40,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:14:40,698 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1343 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 4279 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 4279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:40,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 2980 Invalid, 4680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 4279 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 06:14:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2022-01-10 06:14:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3211. [2022-01-10 06:14:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2410 states have (on average 1.5556016597510374) internal successors, (3749), 2496 states have internal predecessors, (3749), 623 states have call successors, (623), 152 states have call predecessors, (623), 177 states have return successors, (709), 595 states have call predecessors, (709), 618 states have call successors, (709) [2022-01-10 06:14:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 5081 transitions. [2022-01-10 06:14:40,783 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 5081 transitions. Word has length 179 [2022-01-10 06:14:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:40,783 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 5081 transitions. [2022-01-10 06:14:40,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.285714285714286) internal successors, (200), 12 states have internal predecessors, (200), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:14:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 5081 transitions. [2022-01-10 06:14:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-10 06:14:40,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:40,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:40,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:41,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:41,002 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash -67417667, now seen corresponding path program 1 times [2022-01-10 06:14:41,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109825285] [2022-01-10 06:14:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:41,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:41,004 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:41,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:14:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:14:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:14:41,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:14:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:14:42,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:42,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109825285] [2022-01-10 06:14:42,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109825285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:14:42,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:14:42,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-01-10 06:14:42,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476009566] [2022-01-10 06:14:42,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:14:42,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:14:42,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:14:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:14:42,146 INFO L87 Difference]: Start difference. First operand 3211 states and 5081 transitions. Second operand has 11 states, 11 states have (on average 15.272727272727273) internal successors, (168), 11 states have internal predecessors, (168), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) [2022-01-10 06:14:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:46,306 INFO L93 Difference]: Finished difference Result 11049 states and 17731 transitions. [2022-01-10 06:14:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:14:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.272727272727273) internal successors, (168), 11 states have internal predecessors, (168), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) Word has length 180 [2022-01-10 06:14:46,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:46,357 INFO L225 Difference]: With dead ends: 11049 [2022-01-10 06:14:46,357 INFO L226 Difference]: Without dead ends: 7906 [2022-01-10 06:14:46,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:14:46,365 INFO L933 BasicCegarLoop]: 1447 mSDtfsCounter, 4599 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 1414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 6640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1414 IncrementalHoareTripleChecker+Valid, 5226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:46,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 3531 Invalid, 6640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1414 Valid, 5226 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-10 06:14:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7906 states. [2022-01-10 06:14:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7906 to 7852. [2022-01-10 06:14:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7852 states, 5891 states have (on average 1.5342047190629775) internal successors, (9038), 6089 states have internal predecessors, (9038), 1497 states have call successors, (1497), 411 states have call predecessors, (1497), 463 states have return successors, (1834), 1428 states have call predecessors, (1834), 1492 states have call successors, (1834) [2022-01-10 06:14:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 12369 transitions. [2022-01-10 06:14:46,625 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 12369 transitions. Word has length 180 [2022-01-10 06:14:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:46,626 INFO L470 AbstractCegarLoop]: Abstraction has 7852 states and 12369 transitions. [2022-01-10 06:14:46,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.272727272727273) internal successors, (168), 11 states have internal predecessors, (168), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) [2022-01-10 06:14:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 12369 transitions. [2022-01-10 06:14:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-10 06:14:46,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:46,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:46,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:46,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:46,829 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 677847409, now seen corresponding path program 1 times [2022-01-10 06:14:46,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075480702] [2022-01-10 06:14:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:46,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:46,831 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:46,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:14:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:14:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:14:48,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:48,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075480702] [2022-01-10 06:14:48,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075480702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:48,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:48,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:48,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351872816] [2022-01-10 06:14:48,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:48,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:48,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:48,878 INFO L87 Difference]: Start difference. First operand 7852 states and 12369 transitions. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 6 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2022-01-10 06:14:52,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:52,960 INFO L93 Difference]: Finished difference Result 19018 states and 30326 transitions. [2022-01-10 06:14:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:14:52,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 6 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 182 [2022-01-10 06:14:52,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:53,005 INFO L225 Difference]: With dead ends: 19018 [2022-01-10 06:14:53,005 INFO L226 Difference]: Without dead ends: 11240 [2022-01-10 06:14:53,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:14:53,030 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 4382 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 1042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4563 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 4753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1042 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:53,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4563 Valid, 2814 Invalid, 4753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1042 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-10 06:14:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11240 states. [2022-01-10 06:14:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11240 to 10387. [2022-01-10 06:14:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10387 states, 7821 states have (on average 1.5386779184247539) internal successors, (12034), 8081 states have internal predecessors, (12034), 1950 states have call successors, (1950), 556 states have call predecessors, (1950), 615 states have return successors, (2408), 1826 states have call predecessors, (2408), 1945 states have call successors, (2408) [2022-01-10 06:14:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10387 states to 10387 states and 16392 transitions. [2022-01-10 06:14:53,451 INFO L78 Accepts]: Start accepts. Automaton has 10387 states and 16392 transitions. Word has length 182 [2022-01-10 06:14:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:53,451 INFO L470 AbstractCegarLoop]: Abstraction has 10387 states and 16392 transitions. [2022-01-10 06:14:53,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 6 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2022-01-10 06:14:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10387 states and 16392 transitions. [2022-01-10 06:14:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-10 06:14:53,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:53,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:53,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:53,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:53,676 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash 432039190, now seen corresponding path program 1 times [2022-01-10 06:14:53,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:53,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530223924] [2022-01-10 06:14:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:53,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:53,678 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:53,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 06:14:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:54,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:14:54,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:14:54,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:54,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:54,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530223924] [2022-01-10 06:14:54,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530223924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:54,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:54,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:14:54,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015896656] [2022-01-10 06:14:54,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:54,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:14:54,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:14:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:14:54,364 INFO L87 Difference]: Start difference. First operand 10387 states and 16392 transitions. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 8 states have internal predecessors, (127), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21)