/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_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:13:32,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:13:32,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:13:32,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:13:32,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:13:32,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:13:32,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:13:32,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:13:32,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:13:32,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:13:32,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:13:32,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:13:32,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:13:32,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:13:32,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:13:32,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:13:32,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:13:32,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:13:32,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:13:32,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:13:32,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:13:32,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:13:32,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:13:32,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:13:32,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:13:32,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:13:32,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:13:32,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:13:32,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:13:32,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:13:32,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:13:32,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:13:32,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:13:32,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:13:32,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:13:32,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:13:32,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:13:32,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:13:32,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:13:32,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:13:32,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:13:32,476 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 06:13:32,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:13:32,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:13:32,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:13:32,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:13:32,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:13:32,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:13:32,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:13:32,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:13:32,526 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:13:32,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:13:32,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:13:32,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:13:32,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:13:32,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:13:32,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:13:32,527 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:13:32,528 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:13:32,528 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:13:32,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:13:32,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:13:32,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:13:32,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:13:32,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:13:32,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:13:32,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:13:32,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:13:32,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:13:32,540 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:13:32,540 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:13:32,540 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:13:32,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:13:32,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:13:32,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:13:32,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:13:32,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:13:32,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:13:32,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:13:32,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:13:32,816 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:13:32,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2022-01-10 06:13:32,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286a1fb49/3e411393f4924243905010c5acfb0497/FLAG32512a86a [2022-01-10 06:13:33,358 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:13:33,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2022-01-10 06:13:33,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286a1fb49/3e411393f4924243905010c5acfb0497/FLAG32512a86a [2022-01-10 06:13:33,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286a1fb49/3e411393f4924243905010c5acfb0497 [2022-01-10 06:13:33,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:13:33,653 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:13:33,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:13:33,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:13:33,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:13:33,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:13:33" (1/1) ... [2022-01-10 06:13:33,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a11fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:33, skipping insertion in model container [2022-01-10 06:13:33,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:13:33" (1/1) ... [2022-01-10 06:13:33,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:13:33,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:13:33,901 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_product18.cil.c[1545,1558] [2022-01-10 06:13:34,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:13:34,163 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:13:34,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:13:34,180 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_product18.cil.c[1545,1558] [2022-01-10 06:13:34,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:13:34,272 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:13:34,283 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_product18.cil.c[1545,1558] [2022-01-10 06:13:34,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:13:34,381 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:13:34,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34 WrapperNode [2022-01-10 06:13:34,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:13:34,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:13:34,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:13:34,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:13:34,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,451 INFO L137 Inliner]: procedures = 94, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 763 [2022-01-10 06:13:34,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:13:34,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:13:34,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:13:34,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:13:34,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:13:34,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:13:34,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:13:34,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:13:34,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (1/1) ... [2022-01-10 06:13:34,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:13:34,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:13:34,531 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 06:13:34,566 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 06:13:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-01-10 06:13:34,581 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-01-10 06:13:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:13:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-01-10 06:13:34,581 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-01-10 06:13:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-01-10 06:13:34,582 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-01-10 06:13:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:13:34,582 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:13:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:13:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:13:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:13:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:13:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:13:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:13:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:13:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:13:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-01-10 06:13:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-01-10 06:13:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:13:34,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:13:34,584 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:13:34,584 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:13:34,584 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:13:34,584 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:13:34,584 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:13:34,584 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:13:34,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:13:34,584 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:13:34,584 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:13:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:13:34,585 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:13:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:13:34,585 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:13:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:13:34,585 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:13:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:13:34,585 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:13:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2022-01-10 06:13:34,585 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2022-01-10 06:13:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:13:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:13:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:13:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:13:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:13:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:13:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:13:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:13:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:13:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:13:34,779 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:13:34,781 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:13:35,818 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:13:35,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:13:35,834 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:13:35,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:13:35 BoogieIcfgContainer [2022-01-10 06:13:35,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:13:35,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:13:35,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:13:35,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:13:35,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:13:33" (1/3) ... [2022-01-10 06:13:35,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d538962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:13:35, skipping insertion in model container [2022-01-10 06:13:35,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:13:34" (2/3) ... [2022-01-10 06:13:35,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d538962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:13:35, skipping insertion in model container [2022-01-10 06:13:35,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:13:35" (3/3) ... [2022-01-10 06:13:35,847 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2022-01-10 06:13:35,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:13:35,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:13:35,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:13:35,916 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 06:13:35,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:13:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 548 states, 429 states have (on average 1.7016317016317015) internal successors, (730), 452 states have internal predecessors, (730), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2022-01-10 06:13:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:13:35,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:35,973 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] [2022-01-10 06:13:35,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:35,978 INFO L85 PathProgramCache]: Analyzing trace with hash -583983565, now seen corresponding path program 1 times [2022-01-10 06:13:35,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:35,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162070952] [2022-01-10 06:13:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:35,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:35,995 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 06:13:36,004 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 06:13:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:13:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:36,591 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 06:13:36,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:36,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162070952] [2022-01-10 06:13:36,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162070952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:36,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:36,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:13:36,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021107016] [2022-01-10 06:13:36,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:36,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:13:36,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:13:36,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:13:36,621 INFO L87 Difference]: Start difference. First operand has 548 states, 429 states have (on average 1.7016317016317015) internal successors, (730), 452 states have internal predecessors, (730), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:13:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:36,717 INFO L93 Difference]: Finished difference Result 569 states and 948 transitions. [2022-01-10 06:13:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:13:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2022-01-10 06:13:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:36,739 INFO L225 Difference]: With dead ends: 569 [2022-01-10 06:13:36,739 INFO L226 Difference]: Without dead ends: 540 [2022-01-10 06:13:36,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 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 06:13:36,745 INFO L933 BasicCegarLoop]: 909 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, 909 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 06:13:36,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-10 06:13:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-01-10 06:13:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6997635933806146) internal successors, (719), 444 states have internal predecessors, (719), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 902 transitions. [2022-01-10 06:13:36,832 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 902 transitions. Word has length 79 [2022-01-10 06:13:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:36,833 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 902 transitions. [2022-01-10 06:13:36,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:13:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 902 transitions. [2022-01-10 06:13:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:13:36,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:36,859 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] [2022-01-10 06:13:36,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:13:37,068 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 06:13:37,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash 295773415, now seen corresponding path program 1 times [2022-01-10 06:13:37,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670398219] [2022-01-10 06:13:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:37,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:37,074 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 06:13:37,076 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 06:13:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:37,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:37,559 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 06:13:37,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:37,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:37,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670398219] [2022-01-10 06:13:37,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670398219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:37,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:37,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:37,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666039983] [2022-01-10 06:13:37,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:37,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:37,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:37,567 INFO L87 Difference]: Start difference. First operand 540 states and 902 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:37,687 INFO L93 Difference]: Finished difference Result 1071 states and 1796 transitions. [2022-01-10 06:13:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:37,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2022-01-10 06:13:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:37,693 INFO L225 Difference]: With dead ends: 1071 [2022-01-10 06:13:37,693 INFO L226 Difference]: Without dead ends: 540 [2022-01-10 06:13:37,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 06:13:37,701 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 14 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2657 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 06:13:37,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2657 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-10 06:13:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-01-10 06:13:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6973995271867612) internal successors, (718), 444 states have internal predecessors, (718), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 901 transitions. [2022-01-10 06:13:37,731 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 901 transitions. Word has length 81 [2022-01-10 06:13:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:37,732 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 901 transitions. [2022-01-10 06:13:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 901 transitions. [2022-01-10 06:13:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:13:37,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:37,735 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] [2022-01-10 06:13:37,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 06:13:37,947 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 06:13:37,948 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1190651257, now seen corresponding path program 1 times [2022-01-10 06:13:37,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:37,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151119801] [2022-01-10 06:13:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:37,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:37,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:37,951 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 06:13:37,959 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 06:13:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:38,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:38,444 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 06:13:38,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:38,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:38,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151119801] [2022-01-10 06:13:38,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151119801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:38,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:38,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:38,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959425427] [2022-01-10 06:13:38,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:38,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:38,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:38,450 INFO L87 Difference]: Start difference. First operand 540 states and 901 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:38,521 INFO L93 Difference]: Finished difference Result 1071 states and 1794 transitions. [2022-01-10 06:13:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:38,522 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-01-10 06:13:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:38,529 INFO L225 Difference]: With dead ends: 1071 [2022-01-10 06:13:38,529 INFO L226 Difference]: Without dead ends: 540 [2022-01-10 06:13:38,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 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 06:13:38,533 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 12 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2657 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 06:13:38,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2657 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-10 06:13:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-01-10 06:13:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6950354609929077) internal successors, (717), 444 states have internal predecessors, (717), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 900 transitions. [2022-01-10 06:13:38,568 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 900 transitions. Word has length 83 [2022-01-10 06:13:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:38,569 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 900 transitions. [2022-01-10 06:13:38,569 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 900 transitions. [2022-01-10 06:13:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 06:13:38,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:38,574 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] [2022-01-10 06:13:38,594 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 06:13:38,788 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 06:13:38,788 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -756292569, now seen corresponding path program 1 times [2022-01-10 06:13:38,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289779801] [2022-01-10 06:13:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:38,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:38,791 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 06:13:38,793 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 06:13:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:39,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:39,269 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 06:13:39,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:39,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289779801] [2022-01-10 06:13:39,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289779801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:39,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:39,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:39,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034380920] [2022-01-10 06:13:39,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:39,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:39,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:39,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:39,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:39,271 INFO L87 Difference]: Start difference. First operand 540 states and 900 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:39,333 INFO L93 Difference]: Finished difference Result 1075 states and 1797 transitions. [2022-01-10 06:13:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:13:39,334 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-01-10 06:13:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:39,338 INFO L225 Difference]: With dead ends: 1075 [2022-01-10 06:13:39,338 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:13:39,341 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 06:13:39,342 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 13 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2657 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 06:13:39,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2657 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:13:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-01-10 06:13:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6869158878504673) internal successors, (722), 449 states have internal predecessors, (722), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 905 transitions. [2022-01-10 06:13:39,363 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 905 transitions. Word has length 85 [2022-01-10 06:13:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:39,364 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 905 transitions. [2022-01-10 06:13:39,364 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 905 transitions. [2022-01-10 06:13:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 06:13:39,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:39,366 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] [2022-01-10 06:13:39,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:39,588 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 06:13:39,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1855735790, now seen corresponding path program 1 times [2022-01-10 06:13:39,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:39,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179217150] [2022-01-10 06:13:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:39,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:39,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:39,591 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 06:13:39,593 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 06:13:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:40,079 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 06:13:40,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:40,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179217150] [2022-01-10 06:13:40,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179217150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:40,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:40,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:40,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555366908] [2022-01-10 06:13:40,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:40,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:40,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:40,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:40,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:40,081 INFO L87 Difference]: Start difference. First operand 546 states and 905 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:40,137 INFO L93 Difference]: Finished difference Result 1074 states and 1788 transitions. [2022-01-10 06:13:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-01-10 06:13:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:40,142 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 06:13:40,142 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:13:40,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 06:13:40,146 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 8 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2658 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 06:13:40,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2658 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:13:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-01-10 06:13:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6845794392523366) internal successors, (721), 449 states have internal predecessors, (721), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 904 transitions. [2022-01-10 06:13:40,165 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 904 transitions. Word has length 86 [2022-01-10 06:13:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 904 transitions. [2022-01-10 06:13:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 904 transitions. [2022-01-10 06:13:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:13:40,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:40,168 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 06:13:40,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:13:40,387 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 06:13:40,387 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 781528715, now seen corresponding path program 1 times [2022-01-10 06:13:40,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:40,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85308724] [2022-01-10 06:13:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:40,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:40,390 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 06:13:40,393 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 06:13:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:40,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:40,896 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 06:13:40,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:40,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85308724] [2022-01-10 06:13:40,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85308724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:40,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:40,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:40,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166853751] [2022-01-10 06:13:40,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:40,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:40,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:40,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:40,899 INFO L87 Difference]: Start difference. First operand 546 states and 904 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:40,948 INFO L93 Difference]: Finished difference Result 1074 states and 1787 transitions. [2022-01-10 06:13:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:40,948 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2022-01-10 06:13:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:40,953 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 06:13:40,953 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:13:40,955 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 06:13:40,956 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 6 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2658 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 06:13:40,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2658 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:13:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-01-10 06:13:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6822429906542056) internal successors, (720), 449 states have internal predecessors, (720), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 903 transitions. [2022-01-10 06:13:40,975 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 903 transitions. Word has length 87 [2022-01-10 06:13:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 903 transitions. [2022-01-10 06:13:40,975 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 903 transitions. [2022-01-10 06:13:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:13:40,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:40,977 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] [2022-01-10 06:13:40,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:13:41,191 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 06:13:41,192 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1002351562, now seen corresponding path program 1 times [2022-01-10 06:13:41,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:41,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128348303] [2022-01-10 06:13:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:41,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:41,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:41,195 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 06:13:41,197 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 06:13:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:13:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:41,701 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 06:13:41,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:41,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:41,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128348303] [2022-01-10 06:13:41,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128348303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:41,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:41,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:13:41,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460432338] [2022-01-10 06:13:41,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:41,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:13:41,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:41,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:13:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:13:41,703 INFO L87 Difference]: Start difference. First operand 546 states and 903 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:41,837 INFO L93 Difference]: Finished difference Result 1091 states and 1815 transitions. [2022-01-10 06:13:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:13:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2022-01-10 06:13:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:41,842 INFO L225 Difference]: With dead ends: 1091 [2022-01-10 06:13:41,843 INFO L226 Difference]: Without dead ends: 567 [2022-01-10 06:13:41,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 06:13:41,846 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 148 mSDsluCounter, 4328 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5215 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 06:13:41,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5215 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-10 06:13:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2022-01-10 06:13:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 444 states have (on average 1.6801801801801801) internal successors, (746), 467 states have internal predecessors, (746), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2022-01-10 06:13:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 934 transitions. [2022-01-10 06:13:41,880 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 934 transitions. Word has length 88 [2022-01-10 06:13:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:41,881 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 934 transitions. [2022-01-10 06:13:41,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 934 transitions. [2022-01-10 06:13:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:13:41,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:41,883 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] [2022-01-10 06:13:41,903 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 06:13:42,100 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 06:13:42,101 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:42,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1486026889, now seen corresponding path program 1 times [2022-01-10 06:13:42,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:42,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640072984] [2022-01-10 06:13:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:42,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:42,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:42,104 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 06:13:42,106 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 06:13:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:42,600 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 06:13:42,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:42,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:42,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640072984] [2022-01-10 06:13:42,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640072984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:42,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:42,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:42,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109031563] [2022-01-10 06:13:42,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:42,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:42,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:42,602 INFO L87 Difference]: Start difference. First operand 565 states and 934 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:42,650 INFO L93 Difference]: Finished difference Result 1104 states and 1837 transitions. [2022-01-10 06:13:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:13:42,651 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2022-01-10 06:13:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:42,655 INFO L225 Difference]: With dead ends: 1104 [2022-01-10 06:13:42,655 INFO L226 Difference]: Without dead ends: 561 [2022-01-10 06:13:42,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 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 06:13:42,658 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 8 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2657 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 06:13:42,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2657 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-10 06:13:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2022-01-10 06:13:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.6809954751131222) internal successors, (743), 464 states have internal predecessors, (743), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2022-01-10 06:13:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 927 transitions. [2022-01-10 06:13:42,709 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 927 transitions. Word has length 88 [2022-01-10 06:13:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:42,709 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 927 transitions. [2022-01-10 06:13:42,709 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 927 transitions. [2022-01-10 06:13:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:13:42,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:42,711 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] [2022-01-10 06:13:42,734 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 06:13:42,931 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 06:13:42,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash -530748023, now seen corresponding path program 1 times [2022-01-10 06:13:42,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:42,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78997266] [2022-01-10 06:13:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:42,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:42,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:42,935 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 06:13:42,937 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 06:13:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:43,364 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 06:13:43,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:43,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:43,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78997266] [2022-01-10 06:13:43,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78997266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:43,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:43,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:43,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117909505] [2022-01-10 06:13:43,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:43,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:43,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:43,366 INFO L87 Difference]: Start difference. First operand 561 states and 927 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:43,509 INFO L93 Difference]: Finished difference Result 1130 states and 1882 transitions. [2022-01-10 06:13:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:43,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2022-01-10 06:13:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:43,517 INFO L225 Difference]: With dead ends: 1130 [2022-01-10 06:13:43,517 INFO L226 Difference]: Without dead ends: 561 [2022-01-10 06:13:43,520 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 06:13:43,520 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 134 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2465 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 06:13:43,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2465 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-10 06:13:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2022-01-10 06:13:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.669683257918552) internal successors, (738), 464 states have internal predecessors, (738), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2022-01-10 06:13:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 922 transitions. [2022-01-10 06:13:43,538 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 922 transitions. Word has length 89 [2022-01-10 06:13:43,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:43,539 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 922 transitions. [2022-01-10 06:13:43,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:43,539 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 922 transitions. [2022-01-10 06:13:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 06:13:43,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:43,541 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] [2022-01-10 06:13:43,562 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 06:13:43,755 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 06:13:43,756 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1976594173, now seen corresponding path program 1 times [2022-01-10 06:13:43,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:43,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704681808] [2022-01-10 06:13:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:43,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:43,758 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 06:13:43,760 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 06:13:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:44,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:44,205 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 06:13:44,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:44,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:44,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704681808] [2022-01-10 06:13:44,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704681808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:44,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:44,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:44,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158782311] [2022-01-10 06:13:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:44,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:44,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:44,207 INFO L87 Difference]: Start difference. First operand 561 states and 922 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:44,337 INFO L93 Difference]: Finished difference Result 1130 states and 1872 transitions. [2022-01-10 06:13:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:44,338 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-01-10 06:13:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:44,342 INFO L225 Difference]: With dead ends: 1130 [2022-01-10 06:13:44,342 INFO L226 Difference]: Without dead ends: 561 [2022-01-10 06:13:44,345 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 06:13:44,345 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 128 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2465 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 06:13:44,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2465 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-10 06:13:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2022-01-10 06:13:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.658371040723982) internal successors, (733), 464 states have internal predecessors, (733), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2022-01-10 06:13:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 917 transitions. [2022-01-10 06:13:44,363 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 917 transitions. Word has length 91 [2022-01-10 06:13:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:44,363 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 917 transitions. [2022-01-10 06:13:44,363 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 917 transitions. [2022-01-10 06:13:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 06:13:44,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:44,365 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 06:13:44,385 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 06:13:44,583 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 06:13:44,583 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash -684607959, now seen corresponding path program 1 times [2022-01-10 06:13:44,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:44,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690580484] [2022-01-10 06:13:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:44,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:44,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:44,586 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 06:13:44,587 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 06:13:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:44,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:44,997 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 06:13:44,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:44,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690580484] [2022-01-10 06:13:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690580484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:44,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:44,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:44,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360410922] [2022-01-10 06:13:44,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:44,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:44,999 INFO L87 Difference]: Start difference. First operand 561 states and 917 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:45,138 INFO L93 Difference]: Finished difference Result 1151 states and 1893 transitions. [2022-01-10 06:13:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:13:45,140 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2022-01-10 06:13:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:45,144 INFO L225 Difference]: With dead ends: 1151 [2022-01-10 06:13:45,144 INFO L226 Difference]: Without dead ends: 591 [2022-01-10 06:13:45,147 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 06:13:45,147 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 143 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2475 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 06:13:45,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2475 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-10 06:13:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 576. [2022-01-10 06:13:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 457 states have (on average 1.636761487964989) internal successors, (748), 478 states have internal predecessors, (748), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 931 transitions. [2022-01-10 06:13:45,167 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 931 transitions. Word has length 93 [2022-01-10 06:13:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:45,167 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 931 transitions. [2022-01-10 06:13:45,167 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 931 transitions. [2022-01-10 06:13:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 06:13:45,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:45,169 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 06:13:45,190 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 06:13:45,387 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 06:13:45,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:45,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1295693399, now seen corresponding path program 1 times [2022-01-10 06:13:45,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:45,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731766436] [2022-01-10 06:13:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:45,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:45,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:45,390 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 06:13:45,392 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 06:13:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:13:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:45,883 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 06:13:45,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:45,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731766436] [2022-01-10 06:13:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731766436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:45,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:45,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:13:45,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210124541] [2022-01-10 06:13:45,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:45,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:13:45,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:13:45,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:13:45,885 INFO L87 Difference]: Start difference. First operand 576 states and 931 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:45,995 INFO L93 Difference]: Finished difference Result 1115 states and 1814 transitions. [2022-01-10 06:13:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:13:45,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2022-01-10 06:13:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:46,000 INFO L225 Difference]: With dead ends: 1115 [2022-01-10 06:13:46,000 INFO L226 Difference]: Without dead ends: 570 [2022-01-10 06:13:46,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 87 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 06:13:46,004 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 131 mSDsluCounter, 4293 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5183 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 06:13:46,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5183 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-10 06:13:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 555. [2022-01-10 06:13:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6307339449541285) internal successors, (711), 457 states have internal predecessors, (711), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 894 transitions. [2022-01-10 06:13:46,022 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 894 transitions. Word has length 93 [2022-01-10 06:13:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:46,023 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 894 transitions. [2022-01-10 06:13:46,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 894 transitions. [2022-01-10 06:13:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 06:13:46,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:46,025 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] [2022-01-10 06:13:46,045 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 06:13:46,240 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 06:13:46,240 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash 23962835, now seen corresponding path program 1 times [2022-01-10 06:13:46,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:46,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155294758] [2022-01-10 06:13:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:46,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:46,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:46,243 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 06:13:46,244 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 06:13:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:46,689 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 06:13:46,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:46,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155294758] [2022-01-10 06:13:46,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155294758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:46,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:46,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:46,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635169840] [2022-01-10 06:13:46,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:46,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:46,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:46,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:46,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:46,691 INFO L87 Difference]: Start difference. First operand 555 states and 894 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:46,775 INFO L93 Difference]: Finished difference Result 1079 states and 1752 transitions. [2022-01-10 06:13:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:46,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2022-01-10 06:13:46,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:46,780 INFO L225 Difference]: With dead ends: 1079 [2022-01-10 06:13:46,780 INFO L226 Difference]: Without dead ends: 555 [2022-01-10 06:13:46,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 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 06:13:46,783 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 69 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:46,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2489 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-10 06:13:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2022-01-10 06:13:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.628440366972477) internal successors, (710), 457 states have internal predecessors, (710), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 893 transitions. [2022-01-10 06:13:46,799 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 893 transitions. Word has length 94 [2022-01-10 06:13:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:46,799 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 893 transitions. [2022-01-10 06:13:46,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 893 transitions. [2022-01-10 06:13:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-10 06:13:46,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:46,802 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 06:13:46,818 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 06:13:47,016 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 06:13:47,016 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:47,017 INFO L85 PathProgramCache]: Analyzing trace with hash 832386052, now seen corresponding path program 1 times [2022-01-10 06:13:47,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:47,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593632030] [2022-01-10 06:13:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:47,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:47,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:47,019 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 06:13:47,021 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 06:13:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:47,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:47,493 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 06:13:47,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:47,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:47,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593632030] [2022-01-10 06:13:47,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593632030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:47,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:47,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:47,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493753834] [2022-01-10 06:13:47,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:47,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:47,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:47,495 INFO L87 Difference]: Start difference. First operand 555 states and 893 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:47,567 INFO L93 Difference]: Finished difference Result 1079 states and 1751 transitions. [2022-01-10 06:13:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:13:47,568 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2022-01-10 06:13:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:47,571 INFO L225 Difference]: With dead ends: 1079 [2022-01-10 06:13:47,571 INFO L226 Difference]: Without dead ends: 555 [2022-01-10 06:13:47,573 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 06:13:47,574 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 67 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:47,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2489 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-10 06:13:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2022-01-10 06:13:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6261467889908257) internal successors, (709), 457 states have internal predecessors, (709), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 892 transitions. [2022-01-10 06:13:47,588 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 892 transitions. Word has length 95 [2022-01-10 06:13:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:47,588 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 892 transitions. [2022-01-10 06:13:47,589 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 892 transitions. [2022-01-10 06:13:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:13:47,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:47,590 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] [2022-01-10 06:13:47,609 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 06:13:47,803 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 06:13:47,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash 441267086, now seen corresponding path program 1 times [2022-01-10 06:13:47,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:47,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996976749] [2022-01-10 06:13:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:47,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:47,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:47,805 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 06:13:47,806 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 06:13:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:48,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:13:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:48,313 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 06:13:48,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:48,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:48,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996976749] [2022-01-10 06:13:48,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996976749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:48,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:48,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:48,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2177310] [2022-01-10 06:13:48,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:48,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:48,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:48,315 INFO L87 Difference]: Start difference. First operand 555 states and 892 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:48,466 INFO L93 Difference]: Finished difference Result 1084 states and 1758 transitions. [2022-01-10 06:13:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:13:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-01-10 06:13:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:48,471 INFO L225 Difference]: With dead ends: 1084 [2022-01-10 06:13:48,471 INFO L226 Difference]: Without dead ends: 566 [2022-01-10 06:13:48,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 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 06:13:48,475 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 109 mSDsluCounter, 4940 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5774 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 06:13:48,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5774 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-10 06:13:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 557. [2022-01-10 06:13:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 438 states have (on average 1.6210045662100456) internal successors, (710), 459 states have internal predecessors, (710), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 893 transitions. [2022-01-10 06:13:48,490 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 893 transitions. Word has length 96 [2022-01-10 06:13:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:48,491 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 893 transitions. [2022-01-10 06:13:48,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 893 transitions. [2022-01-10 06:13:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:13:48,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:48,492 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] [2022-01-10 06:13:48,512 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 06:13:48,708 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 06:13:48,708 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1075232527, now seen corresponding path program 1 times [2022-01-10 06:13:48,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:48,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905609668] [2022-01-10 06:13:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:48,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:48,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:48,710 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 06:13:48,711 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 06:13:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:13:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:49,187 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 06:13:49,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:49,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:49,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905609668] [2022-01-10 06:13:49,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905609668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:49,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:49,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:49,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52072285] [2022-01-10 06:13:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:49,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:49,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:49,189 INFO L87 Difference]: Start difference. First operand 557 states and 893 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:49,354 INFO L93 Difference]: Finished difference Result 1076 states and 1739 transitions. [2022-01-10 06:13:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:13:49,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-01-10 06:13:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:49,359 INFO L225 Difference]: With dead ends: 1076 [2022-01-10 06:13:49,359 INFO L226 Difference]: Without dead ends: 562 [2022-01-10 06:13:49,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 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 06:13:49,361 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 77 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5782 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 06:13:49,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5782 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-10 06:13:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2022-01-10 06:13:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 440 states have (on average 1.615909090909091) internal successors, (711), 461 states have internal predecessors, (711), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 894 transitions. [2022-01-10 06:13:49,378 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 894 transitions. Word has length 97 [2022-01-10 06:13:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 894 transitions. [2022-01-10 06:13:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 894 transitions. [2022-01-10 06:13:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:13:49,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:49,380 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] [2022-01-10 06:13:49,398 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 06:13:49,598 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 06:13:49,599 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1097218952, now seen corresponding path program 1 times [2022-01-10 06:13:49,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:49,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202859257] [2022-01-10 06:13:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:49,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:49,601 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 06:13:49,601 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 06:13:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:13:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:50,077 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 06:13:50,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:50,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202859257] [2022-01-10 06:13:50,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202859257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:50,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:50,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:13:50,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126045776] [2022-01-10 06:13:50,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:50,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:13:50,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:50,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:13:50,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:13:50,080 INFO L87 Difference]: Start difference. First operand 559 states and 894 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:50,189 INFO L93 Difference]: Finished difference Result 1022 states and 1666 transitions. [2022-01-10 06:13:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:13:50,190 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 98 [2022-01-10 06:13:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:50,193 INFO L225 Difference]: With dead ends: 1022 [2022-01-10 06:13:50,194 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:13:50,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 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 06:13:50,196 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 55 mSDsluCounter, 4173 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5021 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 06:13:50,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 5021 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:13:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-10 06:13:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 433 states have (on average 1.6235565819861433) internal successors, (703), 454 states have internal predecessors, (703), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 886 transitions. [2022-01-10 06:13:50,211 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 886 transitions. Word has length 98 [2022-01-10 06:13:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:50,212 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 886 transitions. [2022-01-10 06:13:50,212 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 886 transitions. [2022-01-10 06:13:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:13:50,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:50,213 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] [2022-01-10 06:13:50,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:50,436 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 06:13:50,436 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1002933603, now seen corresponding path program 1 times [2022-01-10 06:13:50,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:50,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307844492] [2022-01-10 06:13:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:50,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:50,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:50,438 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 06:13:50,439 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 06:13:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:13:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:50,905 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 06:13:50,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:50,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:50,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307844492] [2022-01-10 06:13:50,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307844492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:50,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:50,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:13:50,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340953979] [2022-01-10 06:13:50,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:50,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:13:50,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:50,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:13:50,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:13:50,911 INFO L87 Difference]: Start difference. First operand 552 states and 886 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:51,008 INFO L93 Difference]: Finished difference Result 1027 states and 1680 transitions. [2022-01-10 06:13:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:13:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 99 [2022-01-10 06:13:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:51,013 INFO L225 Difference]: With dead ends: 1027 [2022-01-10 06:13:51,013 INFO L226 Difference]: Without dead ends: 549 [2022-01-10 06:13:51,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 06:13:51,015 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 97 mSDsluCounter, 4141 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4981 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 06:13:51,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4981 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-10 06:13:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2022-01-10 06:13:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 430 states have (on average 1.6232558139534883) internal successors, (698), 451 states have internal predecessors, (698), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 881 transitions. [2022-01-10 06:13:51,030 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 881 transitions. Word has length 99 [2022-01-10 06:13:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:51,030 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 881 transitions. [2022-01-10 06:13:51,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 881 transitions. [2022-01-10 06:13:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:13:51,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:51,032 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] [2022-01-10 06:13:51,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:51,251 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 06:13:51,251 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1153365533, now seen corresponding path program 1 times [2022-01-10 06:13:51,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:51,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033054511] [2022-01-10 06:13:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:51,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:51,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:51,253 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 06:13:51,255 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 06:13:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:51,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:13:51,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:51,691 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 06:13:51,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:51,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033054511] [2022-01-10 06:13:51,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033054511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:51,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:51,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:13:51,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833397841] [2022-01-10 06:13:51,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:51,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:13:51,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:13:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:13:51,693 INFO L87 Difference]: Start difference. First operand 549 states and 881 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:51,774 INFO L93 Difference]: Finished difference Result 1024 states and 1675 transitions. [2022-01-10 06:13:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:13:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 99 [2022-01-10 06:13:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:51,777 INFO L225 Difference]: With dead ends: 1024 [2022-01-10 06:13:51,777 INFO L226 Difference]: Without dead ends: 541 [2022-01-10 06:13:51,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 06:13:51,779 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 105 mSDsluCounter, 4132 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 4971 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 06:13:51,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 4971 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-10 06:13:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2022-01-10 06:13:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 422 states have (on average 1.627962085308057) internal successors, (687), 443 states have internal predecessors, (687), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 870 transitions. [2022-01-10 06:13:51,793 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 870 transitions. Word has length 99 [2022-01-10 06:13:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:51,794 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 870 transitions. [2022-01-10 06:13:51,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 870 transitions. [2022-01-10 06:13:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 06:13:51,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:51,795 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] [2022-01-10 06:13:51,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:52,009 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 06:13:52,009 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash 718859772, now seen corresponding path program 1 times [2022-01-10 06:13:52,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122922768] [2022-01-10 06:13:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:52,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:52,012 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 06:13:52,014 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 06:13:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:52,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:13:52,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:52,464 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 06:13:52,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:52,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:52,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122922768] [2022-01-10 06:13:52,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122922768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:52,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:52,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:52,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933672310] [2022-01-10 06:13:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:52,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:52,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:52,466 INFO L87 Difference]: Start difference. First operand 541 states and 870 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:52,593 INFO L93 Difference]: Finished difference Result 1010 states and 1653 transitions. [2022-01-10 06:13:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:13:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 100 [2022-01-10 06:13:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:52,597 INFO L225 Difference]: With dead ends: 1010 [2022-01-10 06:13:52,597 INFO L226 Difference]: Without dead ends: 541 [2022-01-10 06:13:52,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 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 06:13:52,599 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 67 mSDsluCounter, 4924 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 5759 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 06:13:52,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 5759 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-10 06:13:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2022-01-10 06:13:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 422 states have (on average 1.6255924170616114) internal successors, (686), 443 states have internal predecessors, (686), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 869 transitions. [2022-01-10 06:13:52,613 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 869 transitions. Word has length 100 [2022-01-10 06:13:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:52,613 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 869 transitions. [2022-01-10 06:13:52,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 869 transitions. [2022-01-10 06:13:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 06:13:52,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:52,615 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] [2022-01-10 06:13:52,642 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 06:13:52,833 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 06:13:52,834 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:52,834 INFO L85 PathProgramCache]: Analyzing trace with hash 554425345, now seen corresponding path program 1 times [2022-01-10 06:13:52,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:52,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286702427] [2022-01-10 06:13:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:52,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:52,836 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 06:13:52,837 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 06:13:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:53,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:13:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:53,278 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 06:13:53,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:53,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:53,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286702427] [2022-01-10 06:13:53,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286702427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:53,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:53,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:53,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589770753] [2022-01-10 06:13:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:53,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:53,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:53,280 INFO L87 Difference]: Start difference. First operand 541 states and 869 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:53,405 INFO L93 Difference]: Finished difference Result 1054 states and 1710 transitions. [2022-01-10 06:13:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:13:53,408 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 101 [2022-01-10 06:13:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:53,411 INFO L225 Difference]: With dead ends: 1054 [2022-01-10 06:13:53,411 INFO L226 Difference]: Without dead ends: 538 [2022-01-10 06:13:53,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 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 06:13:53,413 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 101 mSDsluCounter, 4881 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 5704 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 06:13:53,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 5704 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-10 06:13:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-01-10 06:13:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.6181384248210025) internal successors, (678), 440 states have internal predecessors, (678), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 861 transitions. [2022-01-10 06:13:53,427 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 861 transitions. Word has length 101 [2022-01-10 06:13:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:53,427 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 861 transitions. [2022-01-10 06:13:53,427 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 861 transitions. [2022-01-10 06:13:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 06:13:53,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:53,428 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] [2022-01-10 06:13:53,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:53,647 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 06:13:53,647 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash -566525215, now seen corresponding path program 1 times [2022-01-10 06:13:53,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387001532] [2022-01-10 06:13:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:53,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:53,650 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 06:13:53,652 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 06:13:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:53,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:13:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:54,134 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 06:13:54,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:54,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:54,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387001532] [2022-01-10 06:13:54,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387001532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:54,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:54,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:54,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482214201] [2022-01-10 06:13:54,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:54,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:54,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:54,136 INFO L87 Difference]: Start difference. First operand 538 states and 861 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:54,262 INFO L93 Difference]: Finished difference Result 1001 states and 1633 transitions. [2022-01-10 06:13:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:13:54,265 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 102 [2022-01-10 06:13:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:54,268 INFO L225 Difference]: With dead ends: 1001 [2022-01-10 06:13:54,268 INFO L226 Difference]: Without dead ends: 538 [2022-01-10 06:13:54,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 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 06:13:54,271 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 50 mSDsluCounter, 4890 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5714 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 06:13:54,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 5714 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-10 06:13:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-01-10 06:13:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.6157517899761336) internal successors, (677), 440 states have internal predecessors, (677), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 860 transitions. [2022-01-10 06:13:54,284 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 860 transitions. Word has length 102 [2022-01-10 06:13:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:54,285 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 860 transitions. [2022-01-10 06:13:54,285 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 860 transitions. [2022-01-10 06:13:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:13:54,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:54,286 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 06:13:54,311 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 06:13:54,499 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 06:13:54,499 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash 683115442, now seen corresponding path program 1 times [2022-01-10 06:13:54,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:54,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132593339] [2022-01-10 06:13:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:54,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:54,502 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 06:13:54,503 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 06:13:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:13:54,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:54,946 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 06:13:54,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:54,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:54,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132593339] [2022-01-10 06:13:54,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132593339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:54,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:54,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:54,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323159602] [2022-01-10 06:13:54,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:54,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:54,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:54,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:54,948 INFO L87 Difference]: Start difference. First operand 538 states and 860 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:55,066 INFO L93 Difference]: Finished difference Result 1039 states and 1678 transitions. [2022-01-10 06:13:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:13:55,069 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-01-10 06:13:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:55,072 INFO L225 Difference]: With dead ends: 1039 [2022-01-10 06:13:55,072 INFO L226 Difference]: Without dead ends: 535 [2022-01-10 06:13:55,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 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 06:13:55,074 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 69 mSDsluCounter, 4876 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 5698 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 06:13:55,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 5698 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-10 06:13:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2022-01-10 06:13:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 416 states have (on average 1.6081730769230769) internal successors, (669), 437 states have internal predecessors, (669), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:13:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 852 transitions. [2022-01-10 06:13:55,101 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 852 transitions. Word has length 103 [2022-01-10 06:13:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:55,101 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 852 transitions. [2022-01-10 06:13:55,101 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, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:13:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 852 transitions. [2022-01-10 06:13:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:13:55,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:55,103 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] [2022-01-10 06:13:55,123 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 06:13:55,321 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 06:13:55,322 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1878868346, now seen corresponding path program 1 times [2022-01-10 06:13:55,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:55,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940427601] [2022-01-10 06:13:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:55,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:55,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:55,324 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 06:13:55,324 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 06:13:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:55,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:13:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:56,116 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 06:13:56,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:56,117 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940427601] [2022-01-10 06:13:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940427601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:56,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:56,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:13:56,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647665324] [2022-01-10 06:13:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:56,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:13:56,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:13:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:13:56,118 INFO L87 Difference]: Start difference. First operand 535 states and 852 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:58,457 INFO L93 Difference]: Finished difference Result 1588 states and 2631 transitions. [2022-01-10 06:13:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:13:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-01-10 06:13:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:58,464 INFO L225 Difference]: With dead ends: 1588 [2022-01-10 06:13:58,464 INFO L226 Difference]: Without dead ends: 1133 [2022-01-10 06:13:58,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:13:58,467 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 2556 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2663 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:58,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2663 Valid, 1572 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 06:13:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-10 06:13:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1017. [2022-01-10 06:13:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 799 states have (on average 1.6508135168961202) internal successors, (1319), 829 states have internal predecessors, (1319), 177 states have call successors, (177), 39 states have call predecessors, (177), 40 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2022-01-10 06:13:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1675 transitions. [2022-01-10 06:13:58,523 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1675 transitions. Word has length 104 [2022-01-10 06:13:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:58,523 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1675 transitions. [2022-01-10 06:13:58,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:13:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1675 transitions. [2022-01-10 06:13:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:13:58,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:58,528 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, 1, 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 06:13:58,547 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 06:13:58,745 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 06:13:58,745 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash -404411890, now seen corresponding path program 1 times [2022-01-10 06:13:58,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:58,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128482394] [2022-01-10 06:13:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:58,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:58,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:58,747 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 06:13:58,748 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 06:13:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:13:59,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:59,439 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 06:13:59,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:59,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:59,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128482394] [2022-01-10 06:13:59,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128482394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:59,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:59,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:13:59,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885136234] [2022-01-10 06:13:59,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:59,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:13:59,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:13:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:13:59,441 INFO L87 Difference]: Start difference. First operand 1017 states and 1675 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:01,768 INFO L93 Difference]: Finished difference Result 2197 states and 3723 transitions. [2022-01-10 06:14:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 133 [2022-01-10 06:14:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:01,774 INFO L225 Difference]: With dead ends: 2197 [2022-01-10 06:14:01,774 INFO L226 Difference]: Without dead ends: 1260 [2022-01-10 06:14:01,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:14:01,777 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 1341 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 3651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:01,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 2795 Invalid, 3651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 3169 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 06:14:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-10 06:14:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1025. [2022-01-10 06:14:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 805 states have (on average 1.6459627329192548) internal successors, (1325), 835 states have internal predecessors, (1325), 177 states have call successors, (177), 39 states have call predecessors, (177), 42 states have return successors, (211), 163 states have call predecessors, (211), 172 states have call successors, (211) [2022-01-10 06:14:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1713 transitions. [2022-01-10 06:14:01,822 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1713 transitions. Word has length 133 [2022-01-10 06:14:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:01,823 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1713 transitions. [2022-01-10 06:14:01,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1713 transitions. [2022-01-10 06:14:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:14:01,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:01,826 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, 1, 1, 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 06:14:01,846 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 06:14:02,044 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 06:14:02,044 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:02,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2044939391, now seen corresponding path program 1 times [2022-01-10 06:14:02,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:02,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454643315] [2022-01-10 06:14:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:02,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:02,048 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 06:14:02,050 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 06:14:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:14:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:02,635 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 06:14:02,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:02,635 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454643315] [2022-01-10 06:14:02,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454643315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:02,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:02,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:02,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254775737] [2022-01-10 06:14:02,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:02,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:02,637 INFO L87 Difference]: Start difference. First operand 1025 states and 1713 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:06,347 INFO L93 Difference]: Finished difference Result 3682 states and 6351 transitions. [2022-01-10 06:14:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:14:06,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 134 [2022-01-10 06:14:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:06,369 INFO L225 Difference]: With dead ends: 3682 [2022-01-10 06:14:06,369 INFO L226 Difference]: Without dead ends: 2737 [2022-01-10 06:14:06,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:14:06,375 INFO L933 BasicCegarLoop]: 1325 mSDtfsCounter, 2215 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 4118 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2284 SdHoareTripleChecker+Valid, 3375 SdHoareTripleChecker+Invalid, 4778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 4118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:06,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2284 Valid, 3375 Invalid, 4778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 4118 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-10 06:14:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2022-01-10 06:14:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2629. [2022-01-10 06:14:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2054 states have (on average 1.6562804284323271) internal successors, (3402), 2134 states have internal predecessors, (3402), 464 states have call successors, (464), 100 states have call predecessors, (464), 110 states have return successors, (527), 429 states have call predecessors, (527), 459 states have call successors, (527) [2022-01-10 06:14:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 4393 transitions. [2022-01-10 06:14:06,479 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 4393 transitions. Word has length 134 [2022-01-10 06:14:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:06,479 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 4393 transitions. [2022-01-10 06:14:06,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 4393 transitions. [2022-01-10 06:14:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-10 06:14:06,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:06,482 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, 1, 1, 1, 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 06:14:06,505 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 06:14:06,695 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 06:14:06,695 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash 543889726, now seen corresponding path program 1 times [2022-01-10 06:14:06,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:06,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591560172] [2022-01-10 06:14:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:06,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:06,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:06,698 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 06:14:06,699 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 06:14:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:14:07,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:07,278 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 06:14:07,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:07,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591560172] [2022-01-10 06:14:07,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591560172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:07,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:07,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:07,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900358332] [2022-01-10 06:14:07,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:07,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:07,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:07,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:07,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:07,280 INFO L87 Difference]: Start difference. First operand 2629 states and 4393 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-10 06:14:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:10,637 INFO L93 Difference]: Finished difference Result 7583 states and 12727 transitions. [2022-01-10 06:14:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:14:10,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 135 [2022-01-10 06:14:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:10,662 INFO L225 Difference]: With dead ends: 7583 [2022-01-10 06:14:10,662 INFO L226 Difference]: Without dead ends: 5034 [2022-01-10 06:14:10,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 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 06:14:10,674 INFO L933 BasicCegarLoop]: 1199 mSDtfsCounter, 1944 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 4399 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 5058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 4399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:10,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 3256 Invalid, 5058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 4399 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-10 06:14:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2022-01-10 06:14:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 4686. [2022-01-10 06:14:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 3510 states have (on average 1.6222222222222222) internal successors, (5694), 3693 states have internal predecessors, (5694), 992 states have call successors, (992), 152 states have call predecessors, (992), 183 states have return successors, (1127), 918 states have call predecessors, (1127), 987 states have call successors, (1127) [2022-01-10 06:14:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 7813 transitions. [2022-01-10 06:14:10,889 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 7813 transitions. Word has length 135 [2022-01-10 06:14:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:10,890 INFO L470 AbstractCegarLoop]: Abstraction has 4686 states and 7813 transitions. [2022-01-10 06:14:10,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-10 06:14:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 7813 transitions. [2022-01-10 06:14:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 06:14:10,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:10,893 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, 1, 1, 1, 1, 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 06:14:10,912 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 06:14:11,112 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 06:14:11,112 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1455544825, now seen corresponding path program 1 times [2022-01-10 06:14:11,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:11,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127561962] [2022-01-10 06:14:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:11,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:11,114 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 06:14:11,115 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 06:14:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:14:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:11,765 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 06:14:11,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:11,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127561962] [2022-01-10 06:14:11,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127561962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:11,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:11,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:14:11,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660738856] [2022-01-10 06:14:11,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:11,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:14:11,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:14:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:11,767 INFO L87 Difference]: Start difference. First operand 4686 states and 7813 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:16,258 INFO L93 Difference]: Finished difference Result 17458 states and 29956 transitions. [2022-01-10 06:14:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:14:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 136 [2022-01-10 06:14:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:16,333 INFO L225 Difference]: With dead ends: 17458 [2022-01-10 06:14:16,334 INFO L226 Difference]: Without dead ends: 12846 [2022-01-10 06:14:16,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:14:16,362 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 3599 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 4669 mSolverCounterSat, 1328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3703 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 5997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1328 IncrementalHoareTripleChecker+Valid, 4669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:16,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3703 Valid, 3260 Invalid, 5997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1328 Valid, 4669 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-10 06:14:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12846 states. [2022-01-10 06:14:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12846 to 7876. [2022-01-10 06:14:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 5764 states have (on average 1.6063497571131158) internal successors, (9259), 6105 states have internal predecessors, (9259), 1809 states have call successors, (1809), 229 states have call predecessors, (1809), 302 states have return successors, (2176), 1732 states have call predecessors, (2176), 1804 states have call successors, (2176) [2022-01-10 06:14:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 13244 transitions. [2022-01-10 06:14:16,893 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 13244 transitions. Word has length 136 [2022-01-10 06:14:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:16,897 INFO L470 AbstractCegarLoop]: Abstraction has 7876 states and 13244 transitions. [2022-01-10 06:14:16,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 13244 transitions. [2022-01-10 06:14:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 06:14:16,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:16,904 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, 1, 1, 1, 1, 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 06:14:16,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 06:14:17,108 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 06:14:17,108 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1879191547, now seen corresponding path program 1 times [2022-01-10 06:14:17,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:17,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305532374] [2022-01-10 06:14:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:17,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:17,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:17,111 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 06:14:17,139 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 06:14:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:14:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:17,655 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 06:14:17,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:17,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305532374] [2022-01-10 06:14:17,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305532374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:17,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:17,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:17,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890551705] [2022-01-10 06:14:17,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:17,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:17,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:17,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:17,657 INFO L87 Difference]: Start difference. First operand 7876 states and 13244 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:20,757 INFO L93 Difference]: Finished difference Result 23189 states and 39643 transitions. [2022-01-10 06:14:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:14:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 136 [2022-01-10 06:14:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:20,831 INFO L225 Difference]: With dead ends: 23189 [2022-01-10 06:14:20,831 INFO L226 Difference]: Without dead ends: 16587 [2022-01-10 06:14:20,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:14:20,865 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 2550 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2968 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 2442 SdHoareTripleChecker+Invalid, 3537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 2968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:20,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2624 Valid, 2442 Invalid, 3537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 2968 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 06:14:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16587 states. [2022-01-10 06:14:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16587 to 15747. [2022-01-10 06:14:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15747 states, 11523 states have (on average 1.6076542567039833) internal successors, (18525), 12230 states have internal predecessors, (18525), 3565 states have call successors, (3565), 435 states have call predecessors, (3565), 658 states have return successors, (4648), 3436 states have call predecessors, (4648), 3560 states have call successors, (4648) [2022-01-10 06:14:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15747 states to 15747 states and 26738 transitions. [2022-01-10 06:14:21,650 INFO L78 Accepts]: Start accepts. Automaton has 15747 states and 26738 transitions. Word has length 136 [2022-01-10 06:14:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:21,650 INFO L470 AbstractCegarLoop]: Abstraction has 15747 states and 26738 transitions. [2022-01-10 06:14:21,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:14:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand 15747 states and 26738 transitions. [2022-01-10 06:14:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-10 06:14:21,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:21,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:14:21,675 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 06:14:21,872 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 06:14:21,873 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:21,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1001590863, now seen corresponding path program 1 times [2022-01-10 06:14:21,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:21,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246802443] [2022-01-10 06:14:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:21,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:21,875 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 06:14:21,877 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 06:14:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:14:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:22,727 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 06:14:22,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:22,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246802443] [2022-01-10 06:14:22,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246802443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:22,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:22,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:14:22,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554098376] [2022-01-10 06:14:22,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:22,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:14:22,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:22,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:14:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:14:22,729 INFO L87 Difference]: Start difference. First operand 15747 states and 26738 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:14:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:26,916 INFO L93 Difference]: Finished difference Result 33361 states and 56959 transitions. [2022-01-10 06:14:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:14:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 141 [2022-01-10 06:14:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:26,994 INFO L225 Difference]: With dead ends: 33361 [2022-01-10 06:14:26,994 INFO L226 Difference]: Without dead ends: 18888 [2022-01-10 06:14:27,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:14:27,046 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 1908 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 4783 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1979 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 5263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 4783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:27,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1979 Valid, 3212 Invalid, 5263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 4783 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-10 06:14:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18888 states. [2022-01-10 06:14:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18888 to 17403. [2022-01-10 06:14:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17403 states, 12690 states have (on average 1.5848699763593381) internal successors, (20112), 13514 states have internal predecessors, (20112), 3898 states have call successors, (3898), 555 states have call predecessors, (3898), 814 states have return successors, (5332), 3688 states have call predecessors, (5332), 3893 states have call successors, (5332) [2022-01-10 06:14:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17403 states to 17403 states and 29342 transitions. [2022-01-10 06:14:28,096 INFO L78 Accepts]: Start accepts. Automaton has 17403 states and 29342 transitions. Word has length 141 [2022-01-10 06:14:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:28,096 INFO L470 AbstractCegarLoop]: Abstraction has 17403 states and 29342 transitions. [2022-01-10 06:14:28,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:14:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17403 states and 29342 transitions. [2022-01-10 06:14:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 06:14:28,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:28,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:14:28,121 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 06:14:28,317 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 06:14:28,317 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1290515199, now seen corresponding path program 1 times [2022-01-10 06:14:28,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:28,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753060382] [2022-01-10 06:14:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:28,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:28,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:28,321 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 06:14:28,323 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 06:14:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:28,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:28,867 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 06:14:28,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:28,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:28,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753060382] [2022-01-10 06:14:28,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753060382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:28,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:28,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:28,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036115375] [2022-01-10 06:14:28,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:28,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:28,869 INFO L87 Difference]: Start difference. First operand 17403 states and 29342 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:14:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:29,714 INFO L93 Difference]: Finished difference Result 35104 states and 59912 transitions. [2022-01-10 06:14:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:29,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 148 [2022-01-10 06:14:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:29,776 INFO L225 Difference]: With dead ends: 35104 [2022-01-10 06:14:29,776 INFO L226 Difference]: Without dead ends: 17403 [2022-01-10 06:14:29,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 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 06:14:29,824 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 234 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:29,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 2359 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17403 states. [2022-01-10 06:14:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17403 to 17403. [2022-01-10 06:14:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17403 states, 12690 states have (on average 1.5602836879432624) internal successors, (19800), 13514 states have internal predecessors, (19800), 3898 states have call successors, (3898), 555 states have call predecessors, (3898), 814 states have return successors, (5332), 3688 states have call predecessors, (5332), 3893 states have call successors, (5332) [2022-01-10 06:14:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17403 states to 17403 states and 29030 transitions. [2022-01-10 06:14:30,803 INFO L78 Accepts]: Start accepts. Automaton has 17403 states and 29030 transitions. Word has length 148 [2022-01-10 06:14:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:30,803 INFO L470 AbstractCegarLoop]: Abstraction has 17403 states and 29030 transitions. [2022-01-10 06:14:30,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:14:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17403 states and 29030 transitions. [2022-01-10 06:14:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-10 06:14:30,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:30,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:14:30,827 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 06:14:31,023 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 06:14:31,024 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash 266568332, now seen corresponding path program 1 times [2022-01-10 06:14:31,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:31,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037152558] [2022-01-10 06:14:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:31,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:31,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:31,026 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 06:14:31,026 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 06:14:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:14:31,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:14:31,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:31,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037152558] [2022-01-10 06:14:31,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037152558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:31,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:31,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:31,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306893322] [2022-01-10 06:14:31,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:31,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:31,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:31,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:31,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:31,658 INFO L87 Difference]: Start difference. First operand 17403 states and 29030 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 4 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15)