/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_spec3_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:17:15,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:17:15,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:17:15,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:17:15,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:17:15,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:17:15,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:17:15,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:17:15,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:17:15,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:17:15,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:17:15,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:17:15,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:17:15,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:17:15,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:17:15,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:17:15,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:17:15,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:17:15,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:17:15,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:17:15,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:17:15,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:17:15,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:17:15,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:17:15,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:17:15,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:17:15,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:17:15,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:17:15,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:17:15,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:17:15,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:17:15,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:17:15,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:17:15,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:17:15,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:17:15,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:17:15,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:17:15,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:17:15,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:17:15,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:17:15,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:17:15,385 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 06:17:15,410 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:17:15,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:17:15,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:17:15,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:17:15,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:17:15,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:17:15,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:17:15,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:17:15,412 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:17:15,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:17:15,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:17:15,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:17:15,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:17:15,414 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:17:15,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:17:15,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:17:15,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:17:15,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:17:15,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:17:15,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:17:15,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:17:15,633 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:17:15,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product22.cil.c [2022-01-10 06:17:15,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585f71b01/0fcfffe1618a43b9a108d25d6e219cc6/FLAGbdbdd467c [2022-01-10 06:17:16,150 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:17:16,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product22.cil.c [2022-01-10 06:17:16,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585f71b01/0fcfffe1618a43b9a108d25d6e219cc6/FLAGbdbdd467c [2022-01-10 06:17:16,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585f71b01/0fcfffe1618a43b9a108d25d6e219cc6 [2022-01-10 06:17:16,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:17:16,192 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:17:16,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:17:16,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:17:16,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:17:16,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:16,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b58f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16, skipping insertion in model container [2022-01-10 06:17:16,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:16,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:17:16,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:17:16,455 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_spec3_product22.cil.c[3205,3218] [2022-01-10 06:17:16,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:17:16,685 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:17:16,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:17:16,701 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_spec3_product22.cil.c[3205,3218] [2022-01-10 06:17:16,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:17:16,823 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:17:16,843 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_spec3_product22.cil.c[3205,3218] [2022-01-10 06:17:16,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:17:16,943 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:17:16,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16 WrapperNode [2022-01-10 06:17:16,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:17:16,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:17:16,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:17:16,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:17:16,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,049 INFO L137 Inliner]: procedures = 94, calls = 351, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 847 [2022-01-10 06:17:17,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:17:17,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:17:17,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:17:17,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:17:17,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:17:17,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:17:17,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:17:17,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:17:17,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (1/1) ... [2022-01-10 06:17:17,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:17:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:17:17,153 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 06:17:17,191 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 06:17:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:17:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-01-10 06:17:17,208 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-01-10 06:17:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-01-10 06:17:17,209 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-01-10 06:17:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:17:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:17:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-01-10 06:17:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:17:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:17:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:17:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:17:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:17:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:17:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:17:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-01-10 06:17:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-01-10 06:17:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:17:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-01-10 06:17:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-01-10 06:17:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:17:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:17:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:17:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:17:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:17:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:17:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:17:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:17:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-01-10 06:17:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-01-10 06:17:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:17:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:17:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:17:17,213 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:17:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:17:17,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:17:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-01-10 06:17:17,213 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-01-10 06:17:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-01-10 06:17:17,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-01-10 06:17:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:17:17,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:17:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:17:17,215 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:17:17,369 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:17:17,373 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:17:18,180 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:17:18,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:17:18,196 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:17:18,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:17:18 BoogieIcfgContainer [2022-01-10 06:17:18,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:17:18,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:17:18,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:17:18,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:17:18,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:17:16" (1/3) ... [2022-01-10 06:17:18,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20340585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:17:18, skipping insertion in model container [2022-01-10 06:17:18,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:17:16" (2/3) ... [2022-01-10 06:17:18,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20340585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:17:18, skipping insertion in model container [2022-01-10 06:17:18,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:17:18" (3/3) ... [2022-01-10 06:17:18,207 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2022-01-10 06:17:18,212 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:17:18,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:17:18,260 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:17:18,266 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 06:17:18,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:17:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-10 06:17:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:17:18,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:18,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:18,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1321862527, now seen corresponding path program 1 times [2022-01-10 06:17:18,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:18,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189327376] [2022-01-10 06:17:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:18,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:18,327 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 06:17:18,356 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 06:17:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:17:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:18,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:18,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:18,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189327376] [2022-01-10 06:17:18,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189327376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:18,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:18,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:17:18,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920157713] [2022-01-10 06:17:18,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:18,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:17:18,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:17:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:17:18,900 INFO L87 Difference]: Start difference. First operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:19,054 INFO L93 Difference]: Finished difference Result 1189 states and 1980 transitions. [2022-01-10 06:17:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:19,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 67 [2022-01-10 06:17:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:19,069 INFO L225 Difference]: With dead ends: 1189 [2022-01-10 06:17:19,069 INFO L226 Difference]: Without dead ends: 601 [2022-01-10 06:17:19,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 61 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 06:17:19,081 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 117 mSDsluCounter, 4729 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5694 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 06:17:19,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5694 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-10 06:17:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 599. [2022-01-10 06:17:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6645021645021645) internal successors, (769), 482 states have internal predecessors, (769), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 103 states have call predecessors, (108), 106 states have call successors, (108) [2022-01-10 06:17:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 986 transitions. [2022-01-10 06:17:19,146 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 986 transitions. Word has length 67 [2022-01-10 06:17:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:19,147 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 986 transitions. [2022-01-10 06:17:19,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 986 transitions. [2022-01-10 06:17:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:17:19,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:19,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:19,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:17:19,362 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 06:17:19,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1068252313, now seen corresponding path program 1 times [2022-01-10 06:17:19,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:19,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83835933] [2022-01-10 06:17:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:19,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:19,365 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 06:17:19,367 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 06:17:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:17:19,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:19,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:19,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:19,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83835933] [2022-01-10 06:17:19,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83835933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:19,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:19,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:17:19,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790923698] [2022-01-10 06:17:19,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:19,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:17:19,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:17:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:17:19,740 INFO L87 Difference]: Start difference. First operand 599 states and 986 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:19,859 INFO L93 Difference]: Finished difference Result 1193 states and 1975 transitions. [2022-01-10 06:17:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:19,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-01-10 06:17:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:19,864 INFO L225 Difference]: With dead ends: 1193 [2022-01-10 06:17:19,864 INFO L226 Difference]: Without dead ends: 610 [2022-01-10 06:17:19,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 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 06:17:19,867 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 103 mSDsluCounter, 4710 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 5676 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:19,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 5676 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-10 06:17:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 599. [2022-01-10 06:17:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6645021645021645) internal successors, (769), 482 states have internal predecessors, (769), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 103 states have call predecessors, (108), 106 states have call successors, (108) [2022-01-10 06:17:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 986 transitions. [2022-01-10 06:17:19,887 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 986 transitions. Word has length 68 [2022-01-10 06:17:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:19,887 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 986 transitions. [2022-01-10 06:17:19,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 986 transitions. [2022-01-10 06:17:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:17:19,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:19,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:19,902 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 06:17:20,101 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 06:17:20,101 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:20,102 INFO L85 PathProgramCache]: Analyzing trace with hash -550225129, now seen corresponding path program 1 times [2022-01-10 06:17:20,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:20,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487204246] [2022-01-10 06:17:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:20,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:20,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:20,114 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 06:17:20,115 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 06:17:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:20,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:17:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:20,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:20,447 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487204246] [2022-01-10 06:17:20,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487204246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:20,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:20,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:17:20,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147367746] [2022-01-10 06:17:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:17:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:17:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:17:20,449 INFO L87 Difference]: Start difference. First operand 599 states and 986 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:17:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:20,492 INFO L93 Difference]: Finished difference Result 1180 states and 1953 transitions. [2022-01-10 06:17:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:17:20,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2022-01-10 06:17:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:20,495 INFO L225 Difference]: With dead ends: 1180 [2022-01-10 06:17:20,495 INFO L226 Difference]: Without dead ends: 569 [2022-01-10 06:17:20,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 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 06:17:20,498 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 22 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:20,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2858 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:17:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-10 06:17:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2022-01-10 06:17:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 435 states have (on average 1.6482758620689655) internal successors, (717), 453 states have internal predecessors, (717), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:17:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 930 transitions. [2022-01-10 06:17:20,553 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 930 transitions. Word has length 68 [2022-01-10 06:17:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:20,553 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 930 transitions. [2022-01-10 06:17:20,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:17:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 930 transitions. [2022-01-10 06:17:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:17:20,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:20,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:20,588 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 06:17:20,763 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 06:17:20,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:20,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:20,764 INFO L85 PathProgramCache]: Analyzing trace with hash 831976675, now seen corresponding path program 1 times [2022-01-10 06:17:20,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:20,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044657806] [2022-01-10 06:17:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:20,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:20,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:20,780 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 06:17:20,828 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 06:17:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:17:21,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:21,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:21,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:21,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044657806] [2022-01-10 06:17:21,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044657806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:21,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:21,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:17:21,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834934142] [2022-01-10 06:17:21,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:21,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:17:21,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:17:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:17:21,191 INFO L87 Difference]: Start difference. First operand 569 states and 930 transitions. Second operand has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:21,274 INFO L93 Difference]: Finished difference Result 1131 states and 1859 transitions. [2022-01-10 06:17:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:21,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-01-10 06:17:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:21,290 INFO L225 Difference]: With dead ends: 1131 [2022-01-10 06:17:21,290 INFO L226 Difference]: Without dead ends: 563 [2022-01-10 06:17:21,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 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 06:17:21,293 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 89 mSDsluCounter, 4526 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5445 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:21,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5445 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:17:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-10 06:17:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-01-10 06:17:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 429 states have (on average 1.641025641025641) internal successors, (704), 447 states have internal predecessors, (704), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:17:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 917 transitions. [2022-01-10 06:17:21,309 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 917 transitions. Word has length 69 [2022-01-10 06:17:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:21,309 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 917 transitions. [2022-01-10 06:17:21,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 917 transitions. [2022-01-10 06:17:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:17:21,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:21,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:21,331 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 06:17:21,522 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 06:17:21,522 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2027962686, now seen corresponding path program 1 times [2022-01-10 06:17:21,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:21,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536822460] [2022-01-10 06:17:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:21,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:21,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:21,525 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 06:17:21,526 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 06:17:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:17:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:21,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:21,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:21,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536822460] [2022-01-10 06:17:21,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536822460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:21,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:21,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:17:21,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320569373] [2022-01-10 06:17:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:21,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:17:21,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:17:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:17:21,894 INFO L87 Difference]: Start difference. First operand 563 states and 917 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:21,971 INFO L93 Difference]: Finished difference Result 1119 states and 1833 transitions. [2022-01-10 06:17:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2022-01-10 06:17:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:21,976 INFO L225 Difference]: With dead ends: 1119 [2022-01-10 06:17:21,976 INFO L226 Difference]: Without dead ends: 557 [2022-01-10 06:17:21,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 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 06:17:21,981 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 75 mSDsluCounter, 4478 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 5385 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:21,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 5385 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:17:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-10 06:17:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2022-01-10 06:17:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6312056737588652) internal successors, (690), 441 states have internal predecessors, (690), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:17:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 903 transitions. [2022-01-10 06:17:22,002 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 903 transitions. Word has length 70 [2022-01-10 06:17:22,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:22,003 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 903 transitions. [2022-01-10 06:17:22,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 903 transitions. [2022-01-10 06:17:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:17:22,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:22,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:22,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:17:22,216 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 06:17:22,216 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash 912827463, now seen corresponding path program 1 times [2022-01-10 06:17:22,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:22,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360589613] [2022-01-10 06:17:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:22,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:22,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:22,219 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 06:17:22,220 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 06:17:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:17:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:22,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:22,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360589613] [2022-01-10 06:17:22,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360589613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:22,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:22,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:17:22,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605988202] [2022-01-10 06:17:22,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:22,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:17:22,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:17:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:22,582 INFO L87 Difference]: Start difference. First operand 557 states and 903 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:22,705 INFO L93 Difference]: Finished difference Result 1101 states and 1794 transitions. [2022-01-10 06:17:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:17:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2022-01-10 06:17:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:22,713 INFO L225 Difference]: With dead ends: 1101 [2022-01-10 06:17:22,713 INFO L226 Difference]: Without dead ends: 557 [2022-01-10 06:17:22,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 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 06:17:22,729 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 41 mSDsluCounter, 5283 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6168 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:22,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 6168 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-10 06:17:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2022-01-10 06:17:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6288416075650118) internal successors, (689), 441 states have internal predecessors, (689), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:17:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 902 transitions. [2022-01-10 06:17:22,747 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 902 transitions. Word has length 71 [2022-01-10 06:17:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:22,747 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 902 transitions. [2022-01-10 06:17:22,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 902 transitions. [2022-01-10 06:17:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:17:22,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:22,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:22,762 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 06:17:22,960 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 06:17:22,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1385718813, now seen corresponding path program 1 times [2022-01-10 06:17:22,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:22,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979009550] [2022-01-10 06:17:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:22,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:22,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:22,964 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 06:17:22,965 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 06:17:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:17:23,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:23,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:23,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979009550] [2022-01-10 06:17:23,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979009550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:23,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:23,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:17:23,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852435064] [2022-01-10 06:17:23,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:23,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:17:23,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:17:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:23,338 INFO L87 Difference]: Start difference. First operand 557 states and 902 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:23,455 INFO L93 Difference]: Finished difference Result 1101 states and 1792 transitions. [2022-01-10 06:17:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:17:23,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 72 [2022-01-10 06:17:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:23,459 INFO L225 Difference]: With dead ends: 1101 [2022-01-10 06:17:23,459 INFO L226 Difference]: Without dead ends: 557 [2022-01-10 06:17:23,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:17:23,461 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 38 mSDsluCounter, 5283 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6168 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:23,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 6168 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-10 06:17:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2022-01-10 06:17:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6264775413711583) internal successors, (688), 441 states have internal predecessors, (688), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:17:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 901 transitions. [2022-01-10 06:17:23,472 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 901 transitions. Word has length 72 [2022-01-10 06:17:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:23,472 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 901 transitions. [2022-01-10 06:17:23,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 901 transitions. [2022-01-10 06:17:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:17:23,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:23,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:23,485 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 06:17:23,683 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 06:17:23,684 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1452969140, now seen corresponding path program 1 times [2022-01-10 06:17:23,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:23,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294384052] [2022-01-10 06:17:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:23,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:23,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:23,687 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 06:17:23,688 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 06:17:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:17:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:24,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:24,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:24,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294384052] [2022-01-10 06:17:24,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294384052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:24,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:24,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:17:24,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394014330] [2022-01-10 06:17:24,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:24,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:17:24,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:17:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:24,088 INFO L87 Difference]: Start difference. First operand 557 states and 901 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:24,188 INFO L93 Difference]: Finished difference Result 1101 states and 1790 transitions. [2022-01-10 06:17:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:17:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-01-10 06:17:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:24,192 INFO L225 Difference]: With dead ends: 1101 [2022-01-10 06:17:24,192 INFO L226 Difference]: Without dead ends: 557 [2022-01-10 06:17:24,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 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 06:17:24,195 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 35 mSDsluCounter, 5283 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6168 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:24,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 6168 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-10 06:17:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2022-01-10 06:17:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.624113475177305) internal successors, (687), 441 states have internal predecessors, (687), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:17:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 900 transitions. [2022-01-10 06:17:24,209 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 900 transitions. Word has length 73 [2022-01-10 06:17:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:24,210 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 900 transitions. [2022-01-10 06:17:24,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 900 transitions. [2022-01-10 06:17:24,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:17:24,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:24,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:24,239 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 06:17:24,439 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 06:17:24,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 423566914, now seen corresponding path program 1 times [2022-01-10 06:17:24,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:24,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437417843] [2022-01-10 06:17:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:24,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:24,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:24,451 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 06:17:24,452 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 06:17:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:17:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:17:24,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:24,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437417843] [2022-01-10 06:17:24,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437417843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:24,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:24,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:17:24,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111062527] [2022-01-10 06:17:24,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:24,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:17:24,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:17:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:24,816 INFO L87 Difference]: Start difference. First operand 557 states and 900 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:24,927 INFO L93 Difference]: Finished difference Result 1101 states and 1788 transitions. [2022-01-10 06:17:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:17:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2022-01-10 06:17:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:24,932 INFO L225 Difference]: With dead ends: 1101 [2022-01-10 06:17:24,932 INFO L226 Difference]: Without dead ends: 557 [2022-01-10 06:17:24,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 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 06:17:24,934 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 32 mSDsluCounter, 5283 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 6168 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:24,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 6168 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-10 06:17:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2022-01-10 06:17:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6217494089834514) internal successors, (686), 441 states have internal predecessors, (686), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:17:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 899 transitions. [2022-01-10 06:17:24,946 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 899 transitions. Word has length 74 [2022-01-10 06:17:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:24,946 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 899 transitions. [2022-01-10 06:17:24,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 899 transitions. [2022-01-10 06:17:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:17:24,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:24,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:24,965 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 06:17:25,160 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 06:17:25,160 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1851808175, now seen corresponding path program 1 times [2022-01-10 06:17:25,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751208499] [2022-01-10 06:17:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:25,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:25,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:25,165 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 06:17:25,167 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 06:17:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:17:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:17:25,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:25,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:25,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751208499] [2022-01-10 06:17:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751208499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:25,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:25,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:17:25,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974765816] [2022-01-10 06:17:25,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:25,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:17:25,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:17:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:25,561 INFO L87 Difference]: Start difference. First operand 557 states and 899 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:17:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:26,198 INFO L93 Difference]: Finished difference Result 1593 states and 2601 transitions. [2022-01-10 06:17:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2022-01-10 06:17:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:26,204 INFO L225 Difference]: With dead ends: 1593 [2022-01-10 06:17:26,204 INFO L226 Difference]: Without dead ends: 1054 [2022-01-10 06:17:26,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:26,207 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 752 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 4616 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:26,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 4616 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:17:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-01-10 06:17:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1045. [2022-01-10 06:17:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 796 states have (on average 1.585427135678392) internal successors, (1262), 830 states have internal predecessors, (1262), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (203), 190 states have call predecessors, (203), 196 states have call successors, (203) [2022-01-10 06:17:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1665 transitions. [2022-01-10 06:17:26,231 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1665 transitions. Word has length 75 [2022-01-10 06:17:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:26,231 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1665 transitions. [2022-01-10 06:17:26,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:17:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1665 transitions. [2022-01-10 06:17:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:17:26,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:26,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:26,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 06:17:26,442 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 06:17:26,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash -458912943, now seen corresponding path program 1 times [2022-01-10 06:17:26,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:26,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344515398] [2022-01-10 06:17:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:26,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:26,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:26,446 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 06:17:26,447 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 06:17:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:26,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:17:26,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:26,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344515398] [2022-01-10 06:17:26,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344515398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:26,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:26,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:17:26,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867117326] [2022-01-10 06:17:26,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:26,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:17:26,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:17:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:26,854 INFO L87 Difference]: Start difference. First operand 1045 states and 1665 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:27,424 INFO L93 Difference]: Finished difference Result 2624 states and 4257 transitions. [2022-01-10 06:17:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2022-01-10 06:17:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:27,436 INFO L225 Difference]: With dead ends: 2624 [2022-01-10 06:17:27,436 INFO L226 Difference]: Without dead ends: 1597 [2022-01-10 06:17:27,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:27,443 INFO L933 BasicCegarLoop]: 1161 mSDtfsCounter, 862 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 5304 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:27,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 5304 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:17:27,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-01-10 06:17:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1584. [2022-01-10 06:17:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1209 states have (on average 1.5996691480562448) internal successors, (1934), 1258 states have internal predecessors, (1934), 299 states have call successors, (299), 75 states have call predecessors, (299), 75 states have return successors, (326), 291 states have call predecessors, (326), 294 states have call successors, (326) [2022-01-10 06:17:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2559 transitions. [2022-01-10 06:17:27,517 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2559 transitions. Word has length 75 [2022-01-10 06:17:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:27,518 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 2559 transitions. [2022-01-10 06:17:27,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:17:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2559 transitions. [2022-01-10 06:17:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:17:27,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:27,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:27,545 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 06:17:27,746 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 06:17:27,747 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:27,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1359357280, now seen corresponding path program 1 times [2022-01-10 06:17:27,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411873681] [2022-01-10 06:17:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:27,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:27,750 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 06:17:27,752 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 06:17:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:27,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:17:28,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:28,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:28,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411873681] [2022-01-10 06:17:28,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411873681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:28,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:28,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:17:28,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546631682] [2022-01-10 06:17:28,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:28,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:17:28,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:17:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:28,100 INFO L87 Difference]: Start difference. First operand 1584 states and 2559 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:17:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:28,856 INFO L93 Difference]: Finished difference Result 4938 states and 8316 transitions. [2022-01-10 06:17:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2022-01-10 06:17:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:28,878 INFO L225 Difference]: With dead ends: 4938 [2022-01-10 06:17:28,878 INFO L226 Difference]: Without dead ends: 3372 [2022-01-10 06:17:28,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:28,887 INFO L933 BasicCegarLoop]: 1144 mSDtfsCounter, 949 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 5176 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:28,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 5176 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:17:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2022-01-10 06:17:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3096. [2022-01-10 06:17:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 2366 states have (on average 1.5929839391377854) internal successors, (3769), 2462 states have internal predecessors, (3769), 578 states have call successors, (578), 147 states have call predecessors, (578), 151 states have return successors, (745), 568 states have call predecessors, (745), 570 states have call successors, (745) [2022-01-10 06:17:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 5092 transitions. [2022-01-10 06:17:28,990 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 5092 transitions. Word has length 78 [2022-01-10 06:17:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:28,990 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 5092 transitions. [2022-01-10 06:17:28,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:17:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 5092 transitions. [2022-01-10 06:17:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:17:28,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:28,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:29,015 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 06:17:29,203 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 06:17:29,203 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:29,203 INFO L85 PathProgramCache]: Analyzing trace with hash -599142051, now seen corresponding path program 1 times [2022-01-10 06:17:29,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465693858] [2022-01-10 06:17:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:29,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:29,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:29,205 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 06:17:29,207 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 06:17:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:17:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:17:29,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:29,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:29,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465693858] [2022-01-10 06:17:29,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465693858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:29,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:29,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:17:29,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140712451] [2022-01-10 06:17:29,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:29,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:17:29,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:29,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:17:29,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:17:29,597 INFO L87 Difference]: Start difference. First operand 3096 states and 5092 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:17:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:29,756 INFO L93 Difference]: Finished difference Result 6192 states and 10318 transitions. [2022-01-10 06:17:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:17:29,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 79 [2022-01-10 06:17:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:29,772 INFO L225 Difference]: With dead ends: 6192 [2022-01-10 06:17:29,772 INFO L226 Difference]: Without dead ends: 3114 [2022-01-10 06:17:29,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 06:17:29,791 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 19 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:29,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2605 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2022-01-10 06:17:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 3108. [2022-01-10 06:17:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 2375 states have (on average 1.5894736842105264) internal successors, (3775), 2471 states have internal predecessors, (3775), 578 states have call successors, (578), 153 states have call predecessors, (578), 154 states have return successors, (732), 565 states have call predecessors, (732), 570 states have call successors, (732) [2022-01-10 06:17:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 5085 transitions. [2022-01-10 06:17:29,883 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 5085 transitions. Word has length 79 [2022-01-10 06:17:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:29,883 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 5085 transitions. [2022-01-10 06:17:29,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:17:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 5085 transitions. [2022-01-10 06:17:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:17:29,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:29,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:29,913 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 06:17:30,097 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 06:17:30,097 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:30,098 INFO L85 PathProgramCache]: Analyzing trace with hash 687934125, now seen corresponding path program 1 times [2022-01-10 06:17:30,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:30,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88990578] [2022-01-10 06:17:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:30,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:30,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:30,099 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 06:17:30,101 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 06:17:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:30,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:17:30,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:30,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88990578] [2022-01-10 06:17:30,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88990578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:30,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:30,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:17:30,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390264039] [2022-01-10 06:17:30,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:30,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:17:30,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:17:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:30,516 INFO L87 Difference]: Start difference. First operand 3108 states and 5085 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:17:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:31,390 INFO L93 Difference]: Finished difference Result 9773 states and 17034 transitions. [2022-01-10 06:17:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:31,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-01-10 06:17:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:31,435 INFO L225 Difference]: With dead ends: 9773 [2022-01-10 06:17:31,436 INFO L226 Difference]: Without dead ends: 6683 [2022-01-10 06:17:31,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:31,457 INFO L933 BasicCegarLoop]: 1104 mSDtfsCounter, 929 mSDsluCounter, 3922 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 5026 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:31,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 5026 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:17:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6683 states. [2022-01-10 06:17:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6683 to 6171. [2022-01-10 06:17:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6171 states, 4719 states have (on average 1.5842339478703116) internal successors, (7476), 4909 states have internal predecessors, (7476), 1139 states have call successors, (1139), 303 states have call predecessors, (1139), 312 states have return successors, (1759), 1122 states have call predecessors, (1759), 1125 states have call successors, (1759) [2022-01-10 06:17:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 10374 transitions. [2022-01-10 06:17:31,693 INFO L78 Accepts]: Start accepts. Automaton has 6171 states and 10374 transitions. Word has length 87 [2022-01-10 06:17:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:31,694 INFO L470 AbstractCegarLoop]: Abstraction has 6171 states and 10374 transitions. [2022-01-10 06:17:31,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:17:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6171 states and 10374 transitions. [2022-01-10 06:17:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:17:31,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:31,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:31,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 06:17:31,907 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 06:17:31,907 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1924648248, now seen corresponding path program 1 times [2022-01-10 06:17:31,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130017005] [2022-01-10 06:17:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:31,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:31,909 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 06:17:31,950 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 06:17:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:17:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:17:32,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:32,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130017005] [2022-01-10 06:17:32,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130017005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:32,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:32,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:17:32,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344660256] [2022-01-10 06:17:32,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:32,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:17:32,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:17:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:17:32,317 INFO L87 Difference]: Start difference. First operand 6171 states and 10374 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:17:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:32,505 INFO L93 Difference]: Finished difference Result 12396 states and 21183 transitions. [2022-01-10 06:17:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:17:32,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2022-01-10 06:17:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:32,545 INFO L225 Difference]: With dead ends: 12396 [2022-01-10 06:17:32,545 INFO L226 Difference]: Without dead ends: 6243 [2022-01-10 06:17:32,575 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 06:17:32,576 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 21 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:32,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2603 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:17:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2022-01-10 06:17:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 6231. [2022-01-10 06:17:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6231 states, 4773 states have (on average 1.5788812067881834) internal successors, (7536), 4951 states have internal predecessors, (7536), 1139 states have call successors, (1139), 327 states have call predecessors, (1139), 318 states have return successors, (1741), 1116 states have call predecessors, (1741), 1125 states have call successors, (1741) [2022-01-10 06:17:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6231 states to 6231 states and 10416 transitions. [2022-01-10 06:17:32,829 INFO L78 Accepts]: Start accepts. Automaton has 6231 states and 10416 transitions. Word has length 88 [2022-01-10 06:17:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:32,831 INFO L470 AbstractCegarLoop]: Abstraction has 6231 states and 10416 transitions. [2022-01-10 06:17:32,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:17:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6231 states and 10416 transitions. [2022-01-10 06:17:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:17:32,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:32,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:32,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 06:17:33,039 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 06:17:33,039 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash -18431621, now seen corresponding path program 1 times [2022-01-10 06:17:33,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:33,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727655507] [2022-01-10 06:17:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:33,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:33,042 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 06:17:33,043 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 06:17:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:33,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:17:33,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:33,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:33,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727655507] [2022-01-10 06:17:33,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727655507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:33,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:33,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:17:33,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955651855] [2022-01-10 06:17:33,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:33,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:17:33,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:17:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:33,559 INFO L87 Difference]: Start difference. First operand 6231 states and 10416 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:17:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:34,573 INFO L93 Difference]: Finished difference Result 19621 states and 36112 transitions. [2022-01-10 06:17:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:34,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 97 [2022-01-10 06:17:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:34,642 INFO L225 Difference]: With dead ends: 19621 [2022-01-10 06:17:34,642 INFO L226 Difference]: Without dead ends: 13408 [2022-01-10 06:17:34,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:34,673 INFO L933 BasicCegarLoop]: 1100 mSDtfsCounter, 909 mSDsluCounter, 3768 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 4868 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:34,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 4868 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:17:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13408 states. [2022-01-10 06:17:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13408 to 12456. [2022-01-10 06:17:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12456 states, 9545 states have (on average 1.5743321110529074) internal successors, (15027), 9899 states have internal predecessors, (15027), 2264 states have call successors, (2264), 651 states have call predecessors, (2264), 646 states have return successors, (4376), 2233 states have call predecessors, (4376), 2238 states have call successors, (4376) [2022-01-10 06:17:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 21667 transitions. [2022-01-10 06:17:35,195 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 21667 transitions. Word has length 97 [2022-01-10 06:17:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:35,196 INFO L470 AbstractCegarLoop]: Abstraction has 12456 states and 21667 transitions. [2022-01-10 06:17:35,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:17:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 21667 transitions. [2022-01-10 06:17:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:17:35,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:35,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:35,225 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 06:17:35,410 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 06:17:35,410 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash 689445490, now seen corresponding path program 1 times [2022-01-10 06:17:35,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:35,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465772144] [2022-01-10 06:17:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:35,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:35,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:35,414 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 06:17:35,452 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 06:17:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:35,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:17:35,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:17:35,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:35,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:35,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465772144] [2022-01-10 06:17:35,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465772144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:35,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:35,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:17:35,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921687468] [2022-01-10 06:17:35,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:35,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:17:35,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:17:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:17:35,836 INFO L87 Difference]: Start difference. First operand 12456 states and 21667 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, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 06:17:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:36,394 INFO L93 Difference]: Finished difference Result 25038 states and 44585 transitions. [2022-01-10 06:17:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:17:36,394 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, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 98 [2022-01-10 06:17:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:36,609 INFO L225 Difference]: With dead ends: 25038 [2022-01-10 06:17:36,609 INFO L226 Difference]: Without dead ends: 12600 [2022-01-10 06:17:36,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:17:36,666 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 21 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:36,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2603 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12600 states. [2022-01-10 06:17:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12600 to 12576. [2022-01-10 06:17:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12576 states, 9653 states have (on average 1.5691494872060499) internal successors, (15147), 10007 states have internal predecessors, (15147), 2264 states have call successors, (2264), 675 states have call predecessors, (2264), 658 states have return successors, (4356), 2221 states have call predecessors, (4356), 2238 states have call successors, (4356) [2022-01-10 06:17:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12576 states to 12576 states and 21767 transitions. [2022-01-10 06:17:37,096 INFO L78 Accepts]: Start accepts. Automaton has 12576 states and 21767 transitions. Word has length 98 [2022-01-10 06:17:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:37,096 INFO L470 AbstractCegarLoop]: Abstraction has 12576 states and 21767 transitions. [2022-01-10 06:17:37,096 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, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 06:17:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 12576 states and 21767 transitions. [2022-01-10 06:17:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:17:37,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:37,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:37,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:17:37,309 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 06:17:37,310 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1299400590, now seen corresponding path program 1 times [2022-01-10 06:17:37,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:37,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699047638] [2022-01-10 06:17:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:37,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:37,312 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 06:17:37,313 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 06:17:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:37,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:37,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:17:37,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:37,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699047638] [2022-01-10 06:17:37,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699047638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:37,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:37,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:17:37,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200606201] [2022-01-10 06:17:37,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:37,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:17:37,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:17:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:37,742 INFO L87 Difference]: Start difference. First operand 12576 states and 21767 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:17:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:39,490 INFO L93 Difference]: Finished difference Result 39535 states and 79046 transitions. [2022-01-10 06:17:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 108 [2022-01-10 06:17:39,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:39,753 INFO L225 Difference]: With dead ends: 39535 [2022-01-10 06:17:39,753 INFO L226 Difference]: Without dead ends: 26977 [2022-01-10 06:17:39,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:39,885 INFO L933 BasicCegarLoop]: 1112 mSDtfsCounter, 906 mSDsluCounter, 3779 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 4891 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:39,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 4891 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 06:17:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26977 states. [2022-01-10 06:17:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26977 to 25209. [2022-01-10 06:17:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25209 states, 19353 states have (on average 1.564925334573451) internal successors, (30286), 20059 states have internal predecessors, (30286), 4517 states have call successors, (4517), 1347 states have call predecessors, (4517), 1338 states have return successors, (11435), 4458 states have call predecessors, (11435), 4467 states have call successors, (11435) [2022-01-10 06:17:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25209 states to 25209 states and 46238 transitions. [2022-01-10 06:17:41,547 INFO L78 Accepts]: Start accepts. Automaton has 25209 states and 46238 transitions. Word has length 108 [2022-01-10 06:17:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:41,548 INFO L470 AbstractCegarLoop]: Abstraction has 25209 states and 46238 transitions. [2022-01-10 06:17:41,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:17:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 25209 states and 46238 transitions. [2022-01-10 06:17:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 06:17:41,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:41,549 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:41,567 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 06:17:41,760 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 06:17:41,761 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -855641763, now seen corresponding path program 1 times [2022-01-10 06:17:41,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:41,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665366331] [2022-01-10 06:17:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:41,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:41,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:41,767 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 06:17:41,783 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 06:17:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:17:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:42,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:42,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:42,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665366331] [2022-01-10 06:17:42,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665366331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:42,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:42,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:17:42,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345928211] [2022-01-10 06:17:42,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:42,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:17:42,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:17:42,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:17:42,510 INFO L87 Difference]: Start difference. First operand 25209 states and 46238 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:17:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:43,581 INFO L93 Difference]: Finished difference Result 52295 states and 94888 transitions. [2022-01-10 06:17:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:17:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 109 [2022-01-10 06:17:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:43,802 INFO L225 Difference]: With dead ends: 52295 [2022-01-10 06:17:43,803 INFO L226 Difference]: Without dead ends: 27151 [2022-01-10 06:17:44,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:17:44,111 INFO L933 BasicCegarLoop]: 1103 mSDtfsCounter, 774 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:44,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1974 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:17:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27151 states. [2022-01-10 06:17:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27151 to 27012. [2022-01-10 06:17:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27012 states, 20723 states have (on average 1.564493557882546) internal successors, (32421), 21464 states have internal predecessors, (32421), 4850 states have call successors, (4850), 1446 states have call predecessors, (4850), 1438 states have return successors, (12155), 4759 states have call predecessors, (12155), 4797 states have call successors, (12155) [2022-01-10 06:17:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 49426 transitions. [2022-01-10 06:17:45,421 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 49426 transitions. Word has length 109 [2022-01-10 06:17:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:45,421 INFO L470 AbstractCegarLoop]: Abstraction has 27012 states and 49426 transitions. [2022-01-10 06:17:45,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:17:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 49426 transitions. [2022-01-10 06:17:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 06:17:45,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:45,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:17:45,445 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 06:17:45,642 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 06:17:45,643 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1566763652, now seen corresponding path program 1 times [2022-01-10 06:17:45,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442926942] [2022-01-10 06:17:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:45,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:45,656 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 06:17:45,662 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 06:17:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:46,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:46,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:46,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442926942] [2022-01-10 06:17:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442926942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:46,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:46,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:17:46,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498066093] [2022-01-10 06:17:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:46,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:17:46,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:46,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:17:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:17:46,545 INFO L87 Difference]: Start difference. First operand 27012 states and 49426 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-10 06:17:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:52,416 INFO L93 Difference]: Finished difference Result 72382 states and 147463 transitions. [2022-01-10 06:17:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:17:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 158 [2022-01-10 06:17:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:52,805 INFO L225 Difference]: With dead ends: 72382 [2022-01-10 06:17:52,806 INFO L226 Difference]: Without dead ends: 45388 [2022-01-10 06:17:53,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:17:53,017 INFO L933 BasicCegarLoop]: 1478 mSDtfsCounter, 2653 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 4507 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2759 SdHoareTripleChecker+Valid, 3672 SdHoareTripleChecker+Invalid, 5348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 4507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:53,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2759 Valid, 3672 Invalid, 5348 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [841 Valid, 4507 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-10 06:17:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45388 states. [2022-01-10 06:17:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45388 to 45308. [2022-01-10 06:17:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45308 states, 34667 states have (on average 1.5442639974615628) internal successors, (53535), 35827 states have internal predecessors, (53535), 8137 states have call successors, (8137), 2340 states have call predecessors, (8137), 2503 states have return successors, (26330), 8180 states have call predecessors, (26330), 8084 states have call successors, (26330) [2022-01-10 06:17:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45308 states to 45308 states and 88002 transitions. [2022-01-10 06:17:55,334 INFO L78 Accepts]: Start accepts. Automaton has 45308 states and 88002 transitions. Word has length 158 [2022-01-10 06:17:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:55,337 INFO L470 AbstractCegarLoop]: Abstraction has 45308 states and 88002 transitions. [2022-01-10 06:17:55,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-10 06:17:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 45308 states and 88002 transitions. [2022-01-10 06:17:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 06:17:55,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:55,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:17:55,368 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 06:17:55,567 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 06:17:55,568 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:55,569 INFO L85 PathProgramCache]: Analyzing trace with hash 785476611, now seen corresponding path program 1 times [2022-01-10 06:17:55,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:55,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059010931] [2022-01-10 06:17:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:55,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:55,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:55,571 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 06:17:55,578 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 06:17:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:55,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:56,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:56,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059010931] [2022-01-10 06:17:56,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059010931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:56,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:56,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:17:56,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463383346] [2022-01-10 06:17:56,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:56,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:17:56,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:56,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:17:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:17:56,171 INFO L87 Difference]: Start difference. First operand 45308 states and 88002 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-10 06:18:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:03,916 INFO L93 Difference]: Finished difference Result 109891 states and 236152 transitions. [2022-01-10 06:18:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:18:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 159 [2022-01-10 06:18:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:04,705 INFO L225 Difference]: With dead ends: 109891 [2022-01-10 06:18:04,706 INFO L226 Difference]: Without dead ends: 64601 [2022-01-10 06:18:05,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:18:05,317 INFO L933 BasicCegarLoop]: 1483 mSDtfsCounter, 2301 mSDsluCounter, 2289 mSDsCounter, 0 mSdLazyCounter, 4885 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2405 SdHoareTripleChecker+Valid, 3772 SdHoareTripleChecker+Invalid, 5657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 4885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:05,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2405 Valid, 3772 Invalid, 5657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 4885 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-10 06:18:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64601 states. [2022-01-10 06:18:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64601 to 63129. [2022-01-10 06:18:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63129 states, 48344 states have (on average 1.533592586463677) internal successors, (74140), 49957 states have internal predecessors, (74140), 11216 states have call successors, (11216), 3302 states have call predecessors, (11216), 3568 states have return successors, (39738), 11325 states have call predecessors, (39738), 11163 states have call successors, (39738) [2022-01-10 06:18:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63129 states to 63129 states and 125094 transitions. [2022-01-10 06:18:08,762 INFO L78 Accepts]: Start accepts. Automaton has 63129 states and 125094 transitions. Word has length 159 [2022-01-10 06:18:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:08,763 INFO L470 AbstractCegarLoop]: Abstraction has 63129 states and 125094 transitions. [2022-01-10 06:18:08,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-10 06:18:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 63129 states and 125094 transitions. [2022-01-10 06:18:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 06:18:08,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:08,780 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:08,801 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 06:18:09,004 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 06:18:09,005 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1795005168, now seen corresponding path program 1 times [2022-01-10 06:18:09,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771134969] [2022-01-10 06:18:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:09,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:09,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:09,012 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 06:18:09,013 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 06:18:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:09,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:18:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:18:10,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:18:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 06:18:13,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:13,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771134969] [2022-01-10 06:18:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771134969] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:18:13,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:18:13,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-01-10 06:18:13,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95893917] [2022-01-10 06:18:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:13,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:18:13,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:18:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:18:13,257 INFO L87 Difference]: Start difference. First operand 63129 states and 125094 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19)