/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_spec13_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:11:28,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:11:28,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:11:29,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:11:29,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:11:29,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:11:29,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:11:29,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:11:29,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:11:29,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:11:29,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:11:29,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:11:29,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:11:29,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:11:29,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:11:29,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:11:29,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:11:29,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:11:29,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:11:29,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:11:29,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:11:29,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:11:29,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:11:29,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:11:29,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:11:29,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:11:29,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:11:29,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:11:29,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:11:29,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:11:29,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:11:29,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:11:29,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:11:29,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:11:29,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:11:29,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:11:29,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:11:29,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:11:29,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:11:29,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:11:29,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:11:29,077 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 06:11:29,104 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:11:29,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:11:29,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:11:29,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:11:29,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:11:29,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:11:29,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:11:29,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:11:29,107 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:11:29,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:11:29,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:11:29,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:11:29,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:11:29,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:11:29,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:11:29,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:11:29,108 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:11:29,109 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:11:29,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:11:29,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:11:29,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:11:29,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:11:29,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:11:29,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:11:29,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:11:29,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:11:29,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:11:29,110 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:11:29,110 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:11:29,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:11:29,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:11:29,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:11:29,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:11:29,111 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:11:29,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:11:29,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:11:29,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:11:29,353 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:11:29,355 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:11:29,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2022-01-10 06:11:29,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0f7084d/512cae454e53472c90ed793c74855cc1/FLAG0a2c707dd [2022-01-10 06:11:29,995 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:11:29,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2022-01-10 06:11:30,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0f7084d/512cae454e53472c90ed793c74855cc1/FLAG0a2c707dd [2022-01-10 06:11:30,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0f7084d/512cae454e53472c90ed793c74855cc1 [2022-01-10 06:11:30,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:11:30,429 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:11:30,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:11:30,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:11:30,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:11:30,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:11:30" (1/1) ... [2022-01-10 06:11:30,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583d088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:30, skipping insertion in model container [2022-01-10 06:11:30,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:11:30" (1/1) ... [2022-01-10 06:11:30,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:11:30,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:11:30,705 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_spec13_product23.cil.c[1811,1824] [2022-01-10 06:11:31,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:11:31,043 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:11:31,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:11:31,072 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_spec13_product23.cil.c[1811,1824] [2022-01-10 06:11:31,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:11:31,191 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:11:31,204 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_spec13_product23.cil.c[1811,1824] [2022-01-10 06:11:31,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:11:31,324 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:11:31,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31 WrapperNode [2022-01-10 06:11:31,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:11:31,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:11:31,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:11:31,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:11:31,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,406 INFO L137 Inliner]: procedures = 96, calls = 346, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 815 [2022-01-10 06:11:31,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:11:31,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:11:31,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:11:31,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:11:31,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:11:31,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:11:31,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:11:31,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:11:31,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (1/1) ... [2022-01-10 06:11:31,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:11:31,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:11:31,525 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 06:11:31,548 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 06:11:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-01-10 06:11:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-01-10 06:11:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:11:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-01-10 06:11:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-01-10 06:11:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-01-10 06:11:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-01-10 06:11:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-01-10 06:11:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-01-10 06:11:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-01-10 06:11:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-01-10 06:11:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:11:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:11:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-01-10 06:11:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-01-10 06:11:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:11:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:11:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-01-10 06:11:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-01-10 06:11:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:11:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:11:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:11:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:11:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:11:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:11:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:11:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:11:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:11:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:11:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:11:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:11:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:11:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:11:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:11:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-01-10 06:11:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-01-10 06:11:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:11:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:11:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:11:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:11:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:11:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:11:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:11:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:11:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:11:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:11:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-01-10 06:11:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-01-10 06:11:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:11:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:11:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:11:31,574 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:11:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:11:31,574 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:11:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-01-10 06:11:31,574 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-01-10 06:11:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:11:31,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:11:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:11:31,575 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:11:31,705 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:11:31,707 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:11:32,815 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:11:32,833 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:11:32,833 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 06:11:32,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:11:32 BoogieIcfgContainer [2022-01-10 06:11:32,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:11:32,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:11:32,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:11:32,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:11:32,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:11:30" (1/3) ... [2022-01-10 06:11:32,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4526175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:11:32, skipping insertion in model container [2022-01-10 06:11:32,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:31" (2/3) ... [2022-01-10 06:11:32,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4526175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:11:32, skipping insertion in model container [2022-01-10 06:11:32,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:11:32" (3/3) ... [2022-01-10 06:11:32,844 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2022-01-10 06:11:32,848 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:11:32,849 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:11:32,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:11:32,924 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 06:11:32,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:11:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 620 states, 482 states have (on average 1.6742738589211619) internal successors, (807), 500 states have internal predecessors, (807), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-10 06:11:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:11:32,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:32,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:32,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:32,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:33,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1996371556, now seen corresponding path program 1 times [2022-01-10 06:11:33,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:33,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455296732] [2022-01-10 06:11:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:33,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:33,023 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 06:11:33,030 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 06:11:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:11:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 06:11:33,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:33,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455296732] [2022-01-10 06:11:33,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455296732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:33,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:33,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:33,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918537995] [2022-01-10 06:11:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:33,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:11:33,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:11:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:11:33,840 INFO L87 Difference]: Start difference. First operand has 620 states, 482 states have (on average 1.6742738589211619) internal successors, (807), 500 states have internal predecessors, (807), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:34,029 INFO L93 Difference]: Finished difference Result 1234 states and 2054 transitions. [2022-01-10 06:11:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:11:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2022-01-10 06:11:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:34,059 INFO L225 Difference]: With dead ends: 1234 [2022-01-10 06:11:34,059 INFO L226 Difference]: Without dead ends: 614 [2022-01-10 06:11:34,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 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 06:11:34,077 INFO L933 BasicCegarLoop]: 996 mSDtfsCounter, 15 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:34,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2979 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:11:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-10 06:11:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-01-10 06:11:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 478 states have (on average 1.6527196652719665) internal successors, (790), 494 states have internal predecessors, (790), 108 states have call successors, (108), 29 states have call predecessors, (108), 27 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:11:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1003 transitions. [2022-01-10 06:11:34,195 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1003 transitions. Word has length 131 [2022-01-10 06:11:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:34,196 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1003 transitions. [2022-01-10 06:11:34,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1003 transitions. [2022-01-10 06:11:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:11:34,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:34,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:34,227 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 06:11:34,426 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 06:11:34,426 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1920336744, now seen corresponding path program 1 times [2022-01-10 06:11:34,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:34,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346560960] [2022-01-10 06:11:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:34,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:34,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:34,430 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 06:11:34,432 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 06:11:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:34,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:11:34,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:35,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:35,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:35,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346560960] [2022-01-10 06:11:35,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346560960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:35,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:35,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088632517] [2022-01-10 06:11:35,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:35,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:35,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:35,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:35,042 INFO L87 Difference]: Start difference. First operand 614 states and 1003 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:35,274 INFO L93 Difference]: Finished difference Result 1240 states and 2031 transitions. [2022-01-10 06:11:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 133 [2022-01-10 06:11:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:35,282 INFO L225 Difference]: With dead ends: 1240 [2022-01-10 06:11:35,282 INFO L226 Difference]: Without dead ends: 636 [2022-01-10 06:11:35,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 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 06:11:35,288 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 119 mSDsluCounter, 4862 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5856 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:35,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5856 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-10 06:11:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 627. [2022-01-10 06:11:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 488 states have (on average 1.6495901639344261) internal successors, (805), 506 states have internal predecessors, (805), 109 states have call successors, (109), 29 states have call predecessors, (109), 29 states have return successors, (111), 104 states have call predecessors, (111), 106 states have call successors, (111) [2022-01-10 06:11:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1025 transitions. [2022-01-10 06:11:35,329 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1025 transitions. Word has length 133 [2022-01-10 06:11:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:35,329 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1025 transitions. [2022-01-10 06:11:35,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1025 transitions. [2022-01-10 06:11:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:11:35,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:35,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:35,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:35,551 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 06:11:35,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1020029407, now seen corresponding path program 1 times [2022-01-10 06:11:35,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:35,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841469745] [2022-01-10 06:11:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:35,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:35,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:35,557 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 06:11:35,560 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 06:11:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:11:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:36,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:36,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:36,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841469745] [2022-01-10 06:11:36,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841469745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:36,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:36,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:36,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788612547] [2022-01-10 06:11:36,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:36,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:36,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:36,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:36,111 INFO L87 Difference]: Start difference. First operand 627 states and 1025 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:36,418 INFO L93 Difference]: Finished difference Result 1260 states and 2064 transitions. [2022-01-10 06:11:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:36,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 134 [2022-01-10 06:11:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:36,424 INFO L225 Difference]: With dead ends: 1260 [2022-01-10 06:11:36,424 INFO L226 Difference]: Without dead ends: 645 [2022-01-10 06:11:36,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 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 06:11:36,432 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 105 mSDsluCounter, 4898 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5904 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:36,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5904 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:11:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-10 06:11:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 627. [2022-01-10 06:11:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 488 states have (on average 1.6495901639344261) internal successors, (805), 506 states have internal predecessors, (805), 109 states have call successors, (109), 29 states have call predecessors, (109), 29 states have return successors, (111), 104 states have call predecessors, (111), 106 states have call successors, (111) [2022-01-10 06:11:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1025 transitions. [2022-01-10 06:11:36,467 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1025 transitions. Word has length 134 [2022-01-10 06:11:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:36,468 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1025 transitions. [2022-01-10 06:11:36,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1025 transitions. [2022-01-10 06:11:36,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:11:36,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:36,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:36,488 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 06:11:36,688 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 06:11:36,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1691285707, now seen corresponding path program 1 times [2022-01-10 06:11:36,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:36,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044456853] [2022-01-10 06:11:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:36,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:36,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:36,691 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 06:11:36,695 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 06:11:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:11:36,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 06:11:37,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:37,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044456853] [2022-01-10 06:11:37,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044456853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:37,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:37,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:37,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533182413] [2022-01-10 06:11:37,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:37,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:11:37,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:11:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:11:37,164 INFO L87 Difference]: Start difference. First operand 627 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:37,253 INFO L93 Difference]: Finished difference Result 1245 states and 2039 transitions. [2022-01-10 06:11:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:11:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2022-01-10 06:11:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:37,259 INFO L225 Difference]: With dead ends: 1245 [2022-01-10 06:11:37,260 INFO L226 Difference]: Without dead ends: 628 [2022-01-10 06:11:37,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 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 06:11:37,270 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 22 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2946 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:37,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2946 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:11:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-10 06:11:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-01-10 06:11:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 490 states have (on average 1.6489795918367347) internal successors, (808), 507 states have internal predecessors, (808), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2022-01-10 06:11:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1023 transitions. [2022-01-10 06:11:37,297 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1023 transitions. Word has length 134 [2022-01-10 06:11:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:37,298 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1023 transitions. [2022-01-10 06:11:37,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1023 transitions. [2022-01-10 06:11:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 06:11:37,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:37,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:37,320 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 06:11:37,516 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 06:11:37,517 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash 514553011, now seen corresponding path program 1 times [2022-01-10 06:11:37,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:37,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401257221] [2022-01-10 06:11:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:37,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:37,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:37,519 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 06:11:37,520 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 06:11:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:11:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:38,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:38,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:38,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401257221] [2022-01-10 06:11:38,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401257221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:38,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:38,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:38,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202108656] [2022-01-10 06:11:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:38,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:38,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:38,067 INFO L87 Difference]: Start difference. First operand 628 states and 1023 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:38,265 INFO L93 Difference]: Finished difference Result 1250 states and 2044 transitions. [2022-01-10 06:11:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 136 [2022-01-10 06:11:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:38,271 INFO L225 Difference]: With dead ends: 1250 [2022-01-10 06:11:38,271 INFO L226 Difference]: Without dead ends: 637 [2022-01-10 06:11:38,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 06:11:38,275 INFO L933 BasicCegarLoop]: 998 mSDtfsCounter, 104 mSDsluCounter, 4855 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5853 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5853 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-10 06:11:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 628. [2022-01-10 06:11:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 490 states have (on average 1.6489795918367347) internal successors, (808), 507 states have internal predecessors, (808), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2022-01-10 06:11:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1023 transitions. [2022-01-10 06:11:38,295 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1023 transitions. Word has length 136 [2022-01-10 06:11:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:38,296 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1023 transitions. [2022-01-10 06:11:38,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1023 transitions. [2022-01-10 06:11:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-10 06:11:38,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:38,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:38,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:11:38,516 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 06:11:38,517 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1368453772, now seen corresponding path program 1 times [2022-01-10 06:11:38,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:38,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089771984] [2022-01-10 06:11:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:38,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:38,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:38,519 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 06:11:38,521 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 06:11:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:11:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:39,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:39,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089771984] [2022-01-10 06:11:39,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089771984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:39,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:39,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:39,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667675649] [2022-01-10 06:11:39,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:39,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:11:39,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:11:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:11:39,013 INFO L87 Difference]: Start difference. First operand 628 states and 1023 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:39,179 INFO L93 Difference]: Finished difference Result 1270 states and 2082 transitions. [2022-01-10 06:11:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:11:39,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2022-01-10 06:11:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:39,185 INFO L225 Difference]: With dead ends: 1270 [2022-01-10 06:11:39,185 INFO L226 Difference]: Without dead ends: 657 [2022-01-10 06:11:39,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 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 06:11:39,189 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 112 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:39,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2790 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-10 06:11:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 648. [2022-01-10 06:11:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 509 states have (on average 1.6444007858546168) internal successors, (837), 526 states have internal predecessors, (837), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1051 transitions. [2022-01-10 06:11:39,210 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1051 transitions. Word has length 137 [2022-01-10 06:11:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:39,211 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1051 transitions. [2022-01-10 06:11:39,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1051 transitions. [2022-01-10 06:11:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-10 06:11:39,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:39,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:39,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:39,431 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 06:11:39,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1896158791, now seen corresponding path program 1 times [2022-01-10 06:11:39,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:39,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034598069] [2022-01-10 06:11:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:39,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:39,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:39,434 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 06:11:39,434 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 06:11:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:39,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:11:39,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:39,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:39,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:39,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034598069] [2022-01-10 06:11:39,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034598069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:39,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:39,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:39,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703835481] [2022-01-10 06:11:39,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:39,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:39,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:39,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:39,921 INFO L87 Difference]: Start difference. First operand 648 states and 1051 transitions. Second operand has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:40,070 INFO L93 Difference]: Finished difference Result 1299 states and 2113 transitions. [2022-01-10 06:11:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 138 [2022-01-10 06:11:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:40,076 INFO L225 Difference]: With dead ends: 1299 [2022-01-10 06:11:40,076 INFO L226 Difference]: Without dead ends: 666 [2022-01-10 06:11:40,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 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 06:11:40,080 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 154 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5769 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:40,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5769 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-10 06:11:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 648. [2022-01-10 06:11:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 509 states have (on average 1.6444007858546168) internal successors, (837), 526 states have internal predecessors, (837), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1051 transitions. [2022-01-10 06:11:40,101 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1051 transitions. Word has length 138 [2022-01-10 06:11:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:40,101 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1051 transitions. [2022-01-10 06:11:40,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1051 transitions. [2022-01-10 06:11:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-10 06:11:40,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:40,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:40,127 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 06:11:40,326 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 06:11:40,327 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1445422846, now seen corresponding path program 1 times [2022-01-10 06:11:40,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:40,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104676036] [2022-01-10 06:11:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:40,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:40,329 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 06:11:40,331 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 06:11:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:11:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:40,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:40,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:40,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104676036] [2022-01-10 06:11:40,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104676036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:40,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:40,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:11:40,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942212866] [2022-01-10 06:11:40,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:40,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:11:40,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:11:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:11:40,838 INFO L87 Difference]: Start difference. First operand 648 states and 1051 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:41,050 INFO L93 Difference]: Finished difference Result 1294 states and 2104 transitions. [2022-01-10 06:11:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:11:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 139 [2022-01-10 06:11:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:41,055 INFO L225 Difference]: With dead ends: 1294 [2022-01-10 06:11:41,055 INFO L226 Difference]: Without dead ends: 661 [2022-01-10 06:11:41,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:11:41,059 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 112 mSDsluCounter, 5749 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6725 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:41,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6725 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-10 06:11:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 652. [2022-01-10 06:11:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 513 states have (on average 1.6393762183235867) internal successors, (841), 530 states have internal predecessors, (841), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1055 transitions. [2022-01-10 06:11:41,077 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1055 transitions. Word has length 139 [2022-01-10 06:11:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:41,078 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1055 transitions. [2022-01-10 06:11:41,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1055 transitions. [2022-01-10 06:11:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 06:11:41,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:41,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:41,104 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 06:11:41,301 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 06:11:41,302 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:41,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1615998809, now seen corresponding path program 1 times [2022-01-10 06:11:41,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:41,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169601348] [2022-01-10 06:11:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:41,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:41,304 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 06:11:41,306 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 06:11:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:11:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:41,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:41,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169601348] [2022-01-10 06:11:41,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169601348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:41,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:41,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:11:41,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991945698] [2022-01-10 06:11:41,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:41,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:11:41,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:11:41,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:11:41,829 INFO L87 Difference]: Start difference. First operand 652 states and 1055 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:42,097 INFO L93 Difference]: Finished difference Result 1304 states and 2116 transitions. [2022-01-10 06:11:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:11:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 140 [2022-01-10 06:11:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:42,102 INFO L225 Difference]: With dead ends: 1304 [2022-01-10 06:11:42,102 INFO L226 Difference]: Without dead ends: 667 [2022-01-10 06:11:42,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:11:42,108 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 108 mSDsluCounter, 5755 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6733 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:42,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6733 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:11:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-10 06:11:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 658. [2022-01-10 06:11:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 519 states have (on average 1.6319845857418112) internal successors, (847), 536 states have internal predecessors, (847), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1061 transitions. [2022-01-10 06:11:42,130 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1061 transitions. Word has length 140 [2022-01-10 06:11:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:42,130 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1061 transitions. [2022-01-10 06:11:42,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1061 transitions. [2022-01-10 06:11:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-10 06:11:42,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:42,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:42,153 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 06:11:42,349 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 06:11:42,350 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash -714913799, now seen corresponding path program 1 times [2022-01-10 06:11:42,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:42,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760520663] [2022-01-10 06:11:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:42,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:42,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:42,353 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 06:11:42,355 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 06:11:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:11:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:11:42,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:42,818 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760520663] [2022-01-10 06:11:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760520663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:42,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:42,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:11:42,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380858357] [2022-01-10 06:11:42,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:42,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:11:42,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:11:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:11:42,820 INFO L87 Difference]: Start difference. First operand 658 states and 1061 transitions. Second operand has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:43,086 INFO L93 Difference]: Finished difference Result 1318 states and 2132 transitions. [2022-01-10 06:11:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:11:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2022-01-10 06:11:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:43,091 INFO L225 Difference]: With dead ends: 1318 [2022-01-10 06:11:43,091 INFO L226 Difference]: Without dead ends: 675 [2022-01-10 06:11:43,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:11:43,095 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 108 mSDsluCounter, 5755 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6733 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:43,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6733 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:11:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-10 06:11:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 666. [2022-01-10 06:11:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 527 states have (on average 1.6223908918406071) internal successors, (855), 544 states have internal predecessors, (855), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1069 transitions. [2022-01-10 06:11:43,121 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1069 transitions. Word has length 141 [2022-01-10 06:11:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:43,122 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1069 transitions. [2022-01-10 06:11:43,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1069 transitions. [2022-01-10 06:11:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-10 06:11:43,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:43,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:43,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:43,341 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 06:11:43,341 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1530173758, now seen corresponding path program 1 times [2022-01-10 06:11:43,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:43,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028280443] [2022-01-10 06:11:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:43,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:43,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:43,344 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 06:11:43,346 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 06:11:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:11:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:11:43,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:43,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028280443] [2022-01-10 06:11:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028280443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:43,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:43,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:43,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133294253] [2022-01-10 06:11:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:43,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:43,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:43,817 INFO L87 Difference]: Start difference. First operand 666 states and 1069 transitions. Second operand has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:43,987 INFO L93 Difference]: Finished difference Result 1251 states and 2007 transitions. [2022-01-10 06:11:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:43,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 142 [2022-01-10 06:11:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:43,993 INFO L225 Difference]: With dead ends: 1251 [2022-01-10 06:11:43,993 INFO L226 Difference]: Without dead ends: 678 [2022-01-10 06:11:43,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 06:11:43,997 INFO L933 BasicCegarLoop]: 988 mSDtfsCounter, 98 mSDsluCounter, 4838 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 5826 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 06:11:43,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 5826 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-10 06:11:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 673. [2022-01-10 06:11:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 531 states have (on average 1.6177024482109228) internal successors, (859), 550 states have internal predecessors, (859), 109 states have call successors, (109), 31 states have call predecessors, (109), 32 states have return successors, (110), 104 states have call predecessors, (110), 106 states have call successors, (110) [2022-01-10 06:11:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1078 transitions. [2022-01-10 06:11:44,017 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1078 transitions. Word has length 142 [2022-01-10 06:11:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:44,017 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1078 transitions. [2022-01-10 06:11:44,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1078 transitions. [2022-01-10 06:11:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 06:11:44,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:44,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:44,041 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 06:11:44,241 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 06:11:44,242 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1371962173, now seen corresponding path program 1 times [2022-01-10 06:11:44,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:44,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638805748] [2022-01-10 06:11:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:44,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:44,244 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 06:11:44,244 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 06:11:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:44,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:11:44,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:11:44,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:44,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:44,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638805748] [2022-01-10 06:11:44,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638805748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:44,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:44,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:44,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412827499] [2022-01-10 06:11:44,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:44,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:11:44,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:44,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:11:44,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:11:44,675 INFO L87 Difference]: Start difference. First operand 673 states and 1078 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:44,733 INFO L93 Difference]: Finished difference Result 1315 states and 2112 transitions. [2022-01-10 06:11:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:11:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2022-01-10 06:11:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:44,737 INFO L225 Difference]: With dead ends: 1315 [2022-01-10 06:11:44,737 INFO L226 Difference]: Without dead ends: 655 [2022-01-10 06:11:44,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 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 06:11:44,741 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 24 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:44,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 2945 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:11:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-10 06:11:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2022-01-10 06:11:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 516 states have (on average 1.6124031007751938) internal successors, (832), 533 states have internal predecessors, (832), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1046 transitions. [2022-01-10 06:11:44,763 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1046 transitions. Word has length 143 [2022-01-10 06:11:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:44,764 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1046 transitions. [2022-01-10 06:11:44,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1046 transitions. [2022-01-10 06:11:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-10 06:11:44,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:44,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:44,791 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 06:11:44,988 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 06:11:44,988 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:44,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1538991532, now seen corresponding path program 1 times [2022-01-10 06:11:44,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:44,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518894313] [2022-01-10 06:11:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:44,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:44,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:44,990 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 06:11:44,991 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 06:11:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:11:45,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:11:45,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:45,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:45,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518894313] [2022-01-10 06:11:45,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518894313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:45,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:45,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:45,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811482170] [2022-01-10 06:11:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:45,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:45,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:45,414 INFO L87 Difference]: Start difference. First operand 655 states and 1046 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:45,571 INFO L93 Difference]: Finished difference Result 1234 states and 1975 transitions. [2022-01-10 06:11:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 144 [2022-01-10 06:11:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:45,576 INFO L225 Difference]: With dead ends: 1234 [2022-01-10 06:11:45,577 INFO L226 Difference]: Without dead ends: 649 [2022-01-10 06:11:45,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 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 06:11:45,580 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 87 mSDsluCounter, 4752 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 5720 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 06:11:45,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 5720 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-10 06:11:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 646. [2022-01-10 06:11:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 507 states have (on average 1.6094674556213018) internal successors, (816), 524 states have internal predecessors, (816), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1030 transitions. [2022-01-10 06:11:45,598 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1030 transitions. Word has length 144 [2022-01-10 06:11:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:45,599 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1030 transitions. [2022-01-10 06:11:45,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1030 transitions. [2022-01-10 06:11:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-10 06:11:45,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:45,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:45,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 06:11:45,818 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 06:11:45,818 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1039980216, now seen corresponding path program 1 times [2022-01-10 06:11:45,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:45,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003649989] [2022-01-10 06:11:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:45,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:45,820 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 06:11:45,821 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 06:11:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:11:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:11:46,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:46,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003649989] [2022-01-10 06:11:46,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003649989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:46,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:46,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:46,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599717436] [2022-01-10 06:11:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:46,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:46,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:46,289 INFO L87 Difference]: Start difference. First operand 646 states and 1030 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:46,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:46,427 INFO L93 Difference]: Finished difference Result 1225 states and 1959 transitions. [2022-01-10 06:11:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 144 [2022-01-10 06:11:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:46,432 INFO L225 Difference]: With dead ends: 1225 [2022-01-10 06:11:46,432 INFO L226 Difference]: Without dead ends: 636 [2022-01-10 06:11:46,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 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 06:11:46,435 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 99 mSDsluCounter, 4696 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 5656 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:46,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 5656 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-10 06:11:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 633. [2022-01-10 06:11:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 494 states have (on average 1.5931174089068827) internal successors, (787), 511 states have internal predecessors, (787), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:11:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1000 transitions. [2022-01-10 06:11:46,454 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1000 transitions. Word has length 144 [2022-01-10 06:11:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:46,454 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1000 transitions. [2022-01-10 06:11:46,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:11:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1000 transitions. [2022-01-10 06:11:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 06:11:46,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:46,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:46,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:46,673 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 06:11:46,673 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 583304491, now seen corresponding path program 1 times [2022-01-10 06:11:46,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:46,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661939966] [2022-01-10 06:11:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:46,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:46,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:46,675 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 06:11:46,677 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 06:11:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:11:46,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:11:47,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:47,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:47,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661939966] [2022-01-10 06:11:47,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661939966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:47,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:47,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:47,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414831036] [2022-01-10 06:11:47,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:47,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:11:47,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:11:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:11:47,164 INFO L87 Difference]: Start difference. First operand 633 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:47,282 INFO L93 Difference]: Finished difference Result 1276 states and 2016 transitions. [2022-01-10 06:11:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:11:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 146 [2022-01-10 06:11:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:47,287 INFO L225 Difference]: With dead ends: 1276 [2022-01-10 06:11:47,287 INFO L226 Difference]: Without dead ends: 633 [2022-01-10 06:11:47,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 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 06:11:47,291 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 76 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:47,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 2758 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-10 06:11:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2022-01-10 06:11:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 494 states have (on average 1.5769230769230769) internal successors, (779), 510 states have internal predecessors, (779), 108 states have call successors, (108), 32 states have call predecessors, (108), 30 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-10 06:11:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 992 transitions. [2022-01-10 06:11:47,308 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 992 transitions. Word has length 146 [2022-01-10 06:11:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:47,308 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 992 transitions. [2022-01-10 06:11:47,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:11:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 992 transitions. [2022-01-10 06:11:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 06:11:47,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:47,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:47,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:47,527 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 06:11:47,527 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 357096288, now seen corresponding path program 1 times [2022-01-10 06:11:47,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461054897] [2022-01-10 06:11:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:47,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:47,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:47,530 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 06:11:47,530 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 06:11:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:11:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:11:48,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:48,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461054897] [2022-01-10 06:11:48,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461054897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:48,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:48,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:48,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745632969] [2022-01-10 06:11:48,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:48,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:11:48,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:11:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:11:48,010 INFO L87 Difference]: Start difference. First operand 633 states and 992 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:48,679 INFO L93 Difference]: Finished difference Result 1206 states and 1943 transitions. [2022-01-10 06:11:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:11:48,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 147 [2022-01-10 06:11:48,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:48,684 INFO L225 Difference]: With dead ends: 1206 [2022-01-10 06:11:48,684 INFO L226 Difference]: Without dead ends: 637 [2022-01-10 06:11:48,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:11:48,688 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 873 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 2363 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:48,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 2363 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:11:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-10 06:11:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2022-01-10 06:11:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 497 states have (on average 1.5734406438631792) internal successors, (782), 513 states have internal predecessors, (782), 108 states have call successors, (108), 33 states have call predecessors, (108), 31 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2022-01-10 06:11:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 996 transitions. [2022-01-10 06:11:48,721 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 996 transitions. Word has length 147 [2022-01-10 06:11:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:48,722 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 996 transitions. [2022-01-10 06:11:48,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 996 transitions. [2022-01-10 06:11:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-10 06:11:48,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:48,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:48,745 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 06:11:48,946 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 06:11:48,946 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:48,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1888593486, now seen corresponding path program 1 times [2022-01-10 06:11:48,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:48,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551595593] [2022-01-10 06:11:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:48,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:48,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:48,948 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 06:11:48,949 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 06:11:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:49,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:11:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:11:49,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:49,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551595593] [2022-01-10 06:11:49,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551595593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:49,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:49,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:49,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577436786] [2022-01-10 06:11:49,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:49,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:11:49,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:11:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:11:49,462 INFO L87 Difference]: Start difference. First operand 637 states and 996 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:50,095 INFO L93 Difference]: Finished difference Result 1215 states and 1950 transitions. [2022-01-10 06:11:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:11:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 149 [2022-01-10 06:11:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:50,099 INFO L225 Difference]: With dead ends: 1215 [2022-01-10 06:11:50,099 INFO L226 Difference]: Without dead ends: 642 [2022-01-10 06:11:50,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:11:50,103 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 873 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:50,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 2364 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:11:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-10 06:11:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2022-01-10 06:11:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 501 states have (on average 1.5688622754491017) internal successors, (786), 517 states have internal predecessors, (786), 108 states have call successors, (108), 34 states have call predecessors, (108), 32 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2022-01-10 06:11:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1001 transitions. [2022-01-10 06:11:50,122 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1001 transitions. Word has length 149 [2022-01-10 06:11:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:50,122 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1001 transitions. [2022-01-10 06:11:50,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1001 transitions. [2022-01-10 06:11:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-10 06:11:50,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:50,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:50,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:50,339 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 06:11:50,340 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 240224608, now seen corresponding path program 1 times [2022-01-10 06:11:50,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:50,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352856051] [2022-01-10 06:11:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:50,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:50,342 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 06:11:50,344 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 06:11:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:11:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:11:50,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:50,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:50,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352856051] [2022-01-10 06:11:50,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352856051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:50,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:50,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:50,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39764240] [2022-01-10 06:11:50,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:50,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:11:50,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:11:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:11:50,823 INFO L87 Difference]: Start difference. First operand 642 states and 1001 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:51,426 INFO L93 Difference]: Finished difference Result 1226 states and 1959 transitions. [2022-01-10 06:11:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:11:51,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 151 [2022-01-10 06:11:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:51,430 INFO L225 Difference]: With dead ends: 1226 [2022-01-10 06:11:51,430 INFO L226 Difference]: Without dead ends: 648 [2022-01-10 06:11:51,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:11:51,434 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 883 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:51,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 2364 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:11:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-10 06:11:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2022-01-10 06:11:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 506 states have (on average 1.5632411067193677) internal successors, (791), 522 states have internal predecessors, (791), 108 states have call successors, (108), 35 states have call predecessors, (108), 33 states have return successors, (108), 103 states have call predecessors, (108), 105 states have call successors, (108) [2022-01-10 06:11:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1007 transitions. [2022-01-10 06:11:51,453 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1007 transitions. Word has length 151 [2022-01-10 06:11:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:51,454 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1007 transitions. [2022-01-10 06:11:51,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1007 transitions. [2022-01-10 06:11:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-10 06:11:51,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:51,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:51,475 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 06:11:51,671 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 06:11:51,672 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:51,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1037960106, now seen corresponding path program 1 times [2022-01-10 06:11:51,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:51,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322267356] [2022-01-10 06:11:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:51,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:51,673 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 06:11:51,675 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 06:11:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:11:51,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:11:52,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:52,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322267356] [2022-01-10 06:11:52,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322267356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:52,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:52,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:11:52,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109634871] [2022-01-10 06:11:52,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:52,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:11:52,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:11:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:11:52,157 INFO L87 Difference]: Start difference. First operand 648 states and 1007 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:52,727 INFO L93 Difference]: Finished difference Result 1239 states and 1970 transitions. [2022-01-10 06:11:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:11:52,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 153 [2022-01-10 06:11:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:52,731 INFO L225 Difference]: With dead ends: 1239 [2022-01-10 06:11:52,731 INFO L226 Difference]: Without dead ends: 655 [2022-01-10 06:11:52,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:11:52,734 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 875 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:52,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 2364 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:11:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-10 06:11:52,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2022-01-10 06:11:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 512 states have (on average 1.556640625) internal successors, (797), 528 states have internal predecessors, (797), 108 states have call successors, (108), 36 states have call predecessors, (108), 34 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2022-01-10 06:11:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1014 transitions. [2022-01-10 06:11:52,752 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1014 transitions. Word has length 153 [2022-01-10 06:11:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:52,752 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1014 transitions. [2022-01-10 06:11:52,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:11:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1014 transitions. [2022-01-10 06:11:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 06:11:52,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:52,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:52,770 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 06:11:52,970 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 06:11:52,970 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:52,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:52,971 INFO L85 PathProgramCache]: Analyzing trace with hash -141981344, now seen corresponding path program 1 times [2022-01-10 06:11:52,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:52,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815294152] [2022-01-10 06:11:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:52,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:52,972 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 06:11:52,973 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 06:11:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:11:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:11:53,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:11:54,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815294152] [2022-01-10 06:11:54,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815294152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:11:54,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:11:54,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-01-10 06:11:54,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296330423] [2022-01-10 06:11:54,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:11:54,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:11:54,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:11:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:11:54,048 INFO L87 Difference]: Start difference. First operand 655 states and 1014 transitions. Second operand has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2022-01-10 06:12:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:02,485 INFO L93 Difference]: Finished difference Result 2198 states and 3509 transitions. [2022-01-10 06:12:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:12:02,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) Word has length 155 [2022-01-10 06:12:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:02,496 INFO L225 Difference]: With dead ends: 2198 [2022-01-10 06:12:02,496 INFO L226 Difference]: Without dead ends: 1607 [2022-01-10 06:12:02,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:12:02,501 INFO L933 BasicCegarLoop]: 1622 mSDtfsCounter, 1914 mSDsluCounter, 5326 mSDsCounter, 0 mSdLazyCounter, 11917 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 6948 SdHoareTripleChecker+Invalid, 12658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 11917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:02,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2033 Valid, 6948 Invalid, 12658 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [741 Valid, 11917 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-01-10 06:12:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-01-10 06:12:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1359. [2022-01-10 06:12:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1041 states have (on average 1.5609990393852065) internal successors, (1625), 1079 states have internal predecessors, (1625), 245 states have call successors, (245), 69 states have call predecessors, (245), 72 states have return successors, (267), 241 states have call predecessors, (267), 241 states have call successors, (267) [2022-01-10 06:12:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2137 transitions. [2022-01-10 06:12:02,565 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2137 transitions. Word has length 155 [2022-01-10 06:12:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:02,565 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 2137 transitions. [2022-01-10 06:12:02,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2022-01-10 06:12:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2137 transitions. [2022-01-10 06:12:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 06:12:02,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:02,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:12:02,590 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 06:12:02,788 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 06:12:02,788 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:02,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1734755438, now seen corresponding path program 1 times [2022-01-10 06:12:02,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:02,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048927663] [2022-01-10 06:12:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:02,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:02,791 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 06:12:02,791 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 06:12:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:12:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:12:03,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:03,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:03,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048927663] [2022-01-10 06:12:03,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048927663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:03,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:03,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:12:03,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226499154] [2022-01-10 06:12:03,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:03,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:12:03,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:12:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:12:03,329 INFO L87 Difference]: Start difference. First operand 1359 states and 2137 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:12:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:03,570 INFO L93 Difference]: Finished difference Result 2619 states and 4154 transitions. [2022-01-10 06:12:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:12:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2022-01-10 06:12:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:03,580 INFO L225 Difference]: With dead ends: 2619 [2022-01-10 06:12:03,580 INFO L226 Difference]: Without dead ends: 1287 [2022-01-10 06:12:03,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:12:03,588 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 76 mSDsluCounter, 5500 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:03,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 6428 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:12:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-01-10 06:12:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1284. [2022-01-10 06:12:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 982 states have (on average 1.579429735234216) internal successors, (1551), 1019 states have internal predecessors, (1551), 236 states have call successors, (236), 63 states have call predecessors, (236), 65 states have return successors, (252), 232 states have call predecessors, (252), 232 states have call successors, (252) [2022-01-10 06:12:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 2039 transitions. [2022-01-10 06:12:03,650 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 2039 transitions. Word has length 156 [2022-01-10 06:12:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:03,651 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 2039 transitions. [2022-01-10 06:12:03,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:12:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 2039 transitions. [2022-01-10 06:12:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-10 06:12:03,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:03,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:12:03,672 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 06:12:03,873 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 06:12:03,873 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash -767988568, now seen corresponding path program 1 times [2022-01-10 06:12:03,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:03,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345073108] [2022-01-10 06:12:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:03,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:03,876 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 06:12:03,876 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 06:12:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:12:04,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 06:12:04,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:12:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 06:12:04,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345073108] [2022-01-10 06:12:04,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345073108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:12:04,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:12:04,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-01-10 06:12:04,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326799379] [2022-01-10 06:12:04,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:12:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:12:04,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:12:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:12:04,969 INFO L87 Difference]: Start difference. First operand 1284 states and 2039 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:12:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:08,767 INFO L93 Difference]: Finished difference Result 3183 states and 5121 transitions. [2022-01-10 06:12:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:12:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) Word has length 163 [2022-01-10 06:12:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:08,782 INFO L225 Difference]: With dead ends: 3183 [2022-01-10 06:12:08,782 INFO L226 Difference]: Without dead ends: 1962 [2022-01-10 06:12:08,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:12:08,790 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 4393 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 4504 mSolverCounterSat, 1327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4428 SdHoareTripleChecker+Valid, 3434 SdHoareTripleChecker+Invalid, 5831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1327 IncrementalHoareTripleChecker+Valid, 4504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:08,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4428 Valid, 3434 Invalid, 5831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1327 Valid, 4504 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-10 06:12:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-01-10 06:12:08,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1917. [2022-01-10 06:12:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1454 states have (on average 1.5859697386519944) internal successors, (2306), 1512 states have internal predecessors, (2306), 364 states have call successors, (364), 90 states have call predecessors, (364), 98 states have return successors, (405), 363 states have call predecessors, (405), 359 states have call successors, (405) [2022-01-10 06:12:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 3075 transitions. [2022-01-10 06:12:08,879 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 3075 transitions. Word has length 163 [2022-01-10 06:12:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:08,880 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 3075 transitions. [2022-01-10 06:12:08,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2022-01-10 06:12:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 3075 transitions. [2022-01-10 06:12:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-10 06:12:08,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:08,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:12:08,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:09,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:09,101 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1679415201, now seen corresponding path program 1 times [2022-01-10 06:12:09,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:09,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421316446] [2022-01-10 06:12:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:09,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:09,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:09,103 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:09,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:12:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:12:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 06:12:09,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:09,635 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:09,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421316446] [2022-01-10 06:12:09,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421316446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:09,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:09,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:09,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278972524] [2022-01-10 06:12:09,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:09,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:12:09,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:09,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:12:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:09,637 INFO L87 Difference]: Start difference. First operand 1917 states and 3075 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:12:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:10,423 INFO L93 Difference]: Finished difference Result 5483 states and 8896 transitions. [2022-01-10 06:12:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:12:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 164 [2022-01-10 06:12:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:10,444 INFO L225 Difference]: With dead ends: 5483 [2022-01-10 06:12:10,444 INFO L226 Difference]: Without dead ends: 3629 [2022-01-10 06:12:10,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:12:10,454 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 779 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:10,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 3566 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:12:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-01-10 06:12:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3612. [2022-01-10 06:12:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 2723 states have (on average 1.5695923613661402) internal successors, (4274), 2834 states have internal predecessors, (4274), 702 states have call successors, (702), 177 states have call predecessors, (702), 186 states have return successors, (788), 695 states have call predecessors, (788), 694 states have call successors, (788) [2022-01-10 06:12:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 5764 transitions. [2022-01-10 06:12:10,678 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 5764 transitions. Word has length 164 [2022-01-10 06:12:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:10,678 INFO L470 AbstractCegarLoop]: Abstraction has 3612 states and 5764 transitions. [2022-01-10 06:12:10,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:12:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 5764 transitions. [2022-01-10 06:12:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 06:12:10,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:10,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:12:10,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:10,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:10,882 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash 467521000, now seen corresponding path program 1 times [2022-01-10 06:12:10,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:10,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485962962] [2022-01-10 06:12:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:10,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:10,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:10,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:12:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:12:11,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:12:11,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:11,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:11,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485962962] [2022-01-10 06:12:11,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485962962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:11,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:11,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:12:11,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311830610] [2022-01-10 06:12:11,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:11,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:11,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:11,659 INFO L87 Difference]: Start difference. First operand 3612 states and 5764 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:12:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:12,479 INFO L93 Difference]: Finished difference Result 10577 states and 17017 transitions. [2022-01-10 06:12:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 166 [2022-01-10 06:12:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:12,514 INFO L225 Difference]: With dead ends: 10577 [2022-01-10 06:12:12,515 INFO L226 Difference]: Without dead ends: 7028 [2022-01-10 06:12:12,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:12,531 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 848 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:12,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 2773 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:12:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7028 states. [2022-01-10 06:12:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7028 to 6586. [2022-01-10 06:12:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6586 states, 5071 states have (on average 1.5779925064089924) internal successors, (8002), 5235 states have internal predecessors, (8002), 1171 states have call successors, (1171), 324 states have call predecessors, (1171), 343 states have return successors, (1369), 1124 states have call predecessors, (1369), 1157 states have call successors, (1369) [2022-01-10 06:12:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6586 states to 6586 states and 10542 transitions. [2022-01-10 06:12:12,868 INFO L78 Accepts]: Start accepts. Automaton has 6586 states and 10542 transitions. Word has length 166 [2022-01-10 06:12:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:12,869 INFO L470 AbstractCegarLoop]: Abstraction has 6586 states and 10542 transitions. [2022-01-10 06:12:12,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:12:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6586 states and 10542 transitions. [2022-01-10 06:12:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 06:12:12,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:12,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:12:12,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 06:12:13,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:13,081 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:13,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1600140540, now seen corresponding path program 1 times [2022-01-10 06:12:13,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:13,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462763841] [2022-01-10 06:12:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:13,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:13,083 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:13,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:12:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:12:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:12:13,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:13,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:13,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462763841] [2022-01-10 06:12:13,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462763841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:13,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:13,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:12:13,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398740520] [2022-01-10 06:12:13,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:13,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:12:13,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:12:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:12:13,680 INFO L87 Difference]: Start difference. First operand 6586 states and 10542 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:12:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:14,791 INFO L93 Difference]: Finished difference Result 16621 states and 27112 transitions. [2022-01-10 06:12:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:12:14,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 170 [2022-01-10 06:12:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:14,849 INFO L225 Difference]: With dead ends: 16621 [2022-01-10 06:12:14,849 INFO L226 Difference]: Without dead ends: 10098 [2022-01-10 06:12:14,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:12:14,882 INFO L933 BasicCegarLoop]: 1129 mSDtfsCounter, 875 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 4495 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:14,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 4495 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 06:12:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10098 states. [2022-01-10 06:12:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10098 to 10058. [2022-01-10 06:12:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 7681 states have (on average 1.5654211691186044) internal successors, (12024), 7954 states have internal predecessors, (12024), 1840 states have call successors, (1840), 495 states have call predecessors, (1840), 536 states have return successors, (2347), 1801 states have call predecessors, (2347), 1820 states have call successors, (2347) [2022-01-10 06:12:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 16211 transitions. [2022-01-10 06:12:15,416 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 16211 transitions. Word has length 170 [2022-01-10 06:12:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:15,418 INFO L470 AbstractCegarLoop]: Abstraction has 10058 states and 16211 transitions. [2022-01-10 06:12:15,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:12:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 16211 transitions. [2022-01-10 06:12:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 06:12:15,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:15,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:12:15,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:15,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:15,623 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash 632789886, now seen corresponding path program 1 times [2022-01-10 06:12:15,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:15,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164483568] [2022-01-10 06:12:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:15,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:15,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:15,625 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:15,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:12:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:12:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:12:16,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:16,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:16,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164483568] [2022-01-10 06:12:16,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164483568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:16,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:16,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:12:16,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249396675] [2022-01-10 06:12:16,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:16,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:12:16,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:12:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:12:16,132 INFO L87 Difference]: Start difference. First operand 10058 states and 16211 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:12:16,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:16,490 INFO L93 Difference]: Finished difference Result 18434 states and 29141 transitions. [2022-01-10 06:12:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:12:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 170 [2022-01-10 06:12:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:16,564 INFO L225 Difference]: With dead ends: 18434 [2022-01-10 06:12:16,564 INFO L226 Difference]: Without dead ends: 12036 [2022-01-10 06:12:16,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 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 06:12:16,598 INFO L933 BasicCegarLoop]: 1162 mSDtfsCounter, 621 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:16,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 1685 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12036 states. [2022-01-10 06:12:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12036 to 12002. [2022-01-10 06:12:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 9224 states have (on average 1.5293798785776236) internal successors, (14107), 9491 states have internal predecessors, (14107), 2056 states have call successors, (2056), 659 states have call predecessors, (2056), 721 states have return successors, (2746), 2035 states have call predecessors, (2746), 2027 states have call successors, (2746) [2022-01-10 06:12:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 18909 transitions. [2022-01-10 06:12:17,196 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 18909 transitions. Word has length 170 [2022-01-10 06:12:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:17,196 INFO L470 AbstractCegarLoop]: Abstraction has 12002 states and 18909 transitions. [2022-01-10 06:12:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:12:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 18909 transitions. [2022-01-10 06:12:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 06:12:17,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:17,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:12:17,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:17,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:17,417 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash 687182784, now seen corresponding path program 1 times [2022-01-10 06:12:17,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423434679] [2022-01-10 06:12:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:17,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:17,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:17,420 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:17,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:12:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:12:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:12:18,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:12:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 06:12:18,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:18,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423434679] [2022-01-10 06:12:18,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423434679] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:12:18,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:12:18,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 16 [2022-01-10 06:12:18,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402144625] [2022-01-10 06:12:18,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:18,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:12:18,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:12:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:12:18,691 INFO L87 Difference]: Start difference. First operand 12002 states and 18909 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-10 06:12:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:21,570 INFO L93 Difference]: Finished difference Result 19979 states and 31451 transitions. [2022-01-10 06:12:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:12:21,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 170 [2022-01-10 06:12:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:21,635 INFO L225 Difference]: With dead ends: 19979 [2022-01-10 06:12:21,635 INFO L226 Difference]: Without dead ends: 11958 [2022-01-10 06:12:21,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 325 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:12:21,680 INFO L933 BasicCegarLoop]: 1715 mSDtfsCounter, 4985 mSDsluCounter, 3836 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 1177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4992 SdHoareTripleChecker+Valid, 5551 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1177 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:21,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4992 Valid, 5551 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1177 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 06:12:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2022-01-10 06:12:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 11954. [2022-01-10 06:12:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11954 states, 9196 states have (on average 1.529686820356677) internal successors, (14067), 9463 states have internal predecessors, (14067), 2044 states have call successors, (2044), 651 states have call predecessors, (2044), 713 states have return successors, (2734), 2023 states have call predecessors, (2734), 2015 states have call successors, (2734) [2022-01-10 06:12:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11954 states to 11954 states and 18845 transitions. [2022-01-10 06:12:22,231 INFO L78 Accepts]: Start accepts. Automaton has 11954 states and 18845 transitions. Word has length 170 [2022-01-10 06:12:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:22,231 INFO L470 AbstractCegarLoop]: Abstraction has 11954 states and 18845 transitions. [2022-01-10 06:12:22,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-10 06:12:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 11954 states and 18845 transitions. [2022-01-10 06:12:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-10 06:12:22,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:22,236 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:12:22,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:22,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:22,452 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1421397859, now seen corresponding path program 1 times [2022-01-10 06:12:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079607103] [2022-01-10 06:12:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:22,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:22,460 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:22,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:12:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:22,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:12:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:12:23,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:23,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:23,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079607103] [2022-01-10 06:12:23,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079607103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:23,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:23,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:12:23,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300436753] [2022-01-10 06:12:23,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:23,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:12:23,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:12:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:12:23,150 INFO L87 Difference]: Start difference. First operand 11954 states and 18845 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:12:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:24,075 INFO L93 Difference]: Finished difference Result 31883 states and 52213 transitions. [2022-01-10 06:12:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:12:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 177 [2022-01-10 06:12:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:24,214 INFO L225 Difference]: With dead ends: 31883 [2022-01-10 06:12:24,214 INFO L226 Difference]: Without dead ends: 19980 [2022-01-10 06:12:24,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 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 06:12:24,316 INFO L933 BasicCegarLoop]: 1165 mSDtfsCounter, 853 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:24,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 2043 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19980 states. [2022-01-10 06:12:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19980 to 19970. [2022-01-10 06:12:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19970 states, 15266 states have (on average 1.5249574217214725) internal successors, (23280), 15755 states have internal predecessors, (23280), 3515 states have call successors, (3515), 1079 states have call predecessors, (3515), 1188 states have return successors, (5462), 3503 states have call predecessors, (5462), 3468 states have call successors, (5462) [2022-01-10 06:12:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19970 states to 19970 states and 32257 transitions. [2022-01-10 06:12:25,444 INFO L78 Accepts]: Start accepts. Automaton has 19970 states and 32257 transitions. Word has length 177 [2022-01-10 06:12:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:25,445 INFO L470 AbstractCegarLoop]: Abstraction has 19970 states and 32257 transitions. [2022-01-10 06:12:25,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:12:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 19970 states and 32257 transitions. [2022-01-10 06:12:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 06:12:25,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:25,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:12:25,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:25,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:25,664 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash 93365809, now seen corresponding path program 1 times [2022-01-10 06:12:25,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:25,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629083143] [2022-01-10 06:12:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:25,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:25,667 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:25,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:12:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:12:26,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:12:26,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:26,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629083143] [2022-01-10 06:12:26,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629083143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:26,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:26,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:12:26,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469818616] [2022-01-10 06:12:26,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:26,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:12:26,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:12:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:12:26,271 INFO L87 Difference]: Start difference. First operand 19970 states and 32257 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18)