/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_spec2_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:14:48,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:14:48,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:14:48,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:14:48,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:14:48,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:14:48,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:14:48,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:14:48,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:14:48,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:14:48,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:14:48,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:14:48,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:14:48,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:14:48,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:14:48,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:14:48,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:14:48,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:14:48,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:14:48,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:14:48,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:14:48,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:14:48,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:14:48,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:14:48,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:14:48,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:14:48,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:14:48,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:14:48,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:14:48,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:14:48,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:14:48,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:14:48,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:14:48,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:14:48,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:14:48,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:14:48,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:14:48,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:14:48,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:14:48,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:14:48,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:14:48,102 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 06:14:48,126 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:14:48,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:14:48,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:14:48,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:14:48,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:14:48,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:14:48,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:14:48,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:14:48,128 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:14:48,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:14:48,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:14:48,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:14:48,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:14:48,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:14:48,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:14:48,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:14:48,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:14:48,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:14:48,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:14:48,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:14:48,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:14:48,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:14:48,371 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:14:48,371 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:14:48,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product01.cil.c [2022-01-10 06:14:48,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4492552d/cfed5582fe5b41839ac9221296e75651/FLAG15b0e5842 [2022-01-10 06:14:48,955 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:14:48,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product01.cil.c [2022-01-10 06:14:48,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4492552d/cfed5582fe5b41839ac9221296e75651/FLAG15b0e5842 [2022-01-10 06:14:49,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4492552d/cfed5582fe5b41839ac9221296e75651 [2022-01-10 06:14:49,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:14:49,168 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:14:49,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:14:49,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:14:49,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:14:49,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ef5854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49, skipping insertion in model container [2022-01-10 06:14:49,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:14:49,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:14:49,375 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_spec2_product01.cil.c[1545,1558] [2022-01-10 06:14:49,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:14:49,564 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:14:49,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:14:49,576 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_spec2_product01.cil.c[1545,1558] [2022-01-10 06:14:49,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:14:49,668 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:14:49,675 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_spec2_product01.cil.c[1545,1558] [2022-01-10 06:14:49,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:14:49,742 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:14:49,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49 WrapperNode [2022-01-10 06:14:49,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:14:49,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:14:49,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:14:49,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:14:49,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,798 INFO L137 Inliner]: procedures = 90, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 714 [2022-01-10 06:14:49,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:14:49,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:14:49,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:14:49,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:14:49,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:14:49,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:14:49,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:14:49,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:14:49,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (1/1) ... [2022-01-10 06:14:49,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:14:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:14:49,892 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 06:14:49,911 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 06:14:49,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:14:49,931 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-01-10 06:14:49,931 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-01-10 06:14:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:14:49,932 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:14:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:14:49,932 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:14:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:14:49,932 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:14:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:14:49,932 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:14:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:14:49,932 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:14:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-01-10 06:14:49,932 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:14:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:14:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:14:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:14:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:14:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:14:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:14:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:14:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:14:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:14:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:14:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:14:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:14:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:14:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:14:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:14:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:14:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:14:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:14:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:14:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:14:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:14:49,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:14:50,082 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:14:50,083 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:14:50,810 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:14:50,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:14:50,824 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:14:50,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:14:50 BoogieIcfgContainer [2022-01-10 06:14:50,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:14:50,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:14:50,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:14:50,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:14:50,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:14:49" (1/3) ... [2022-01-10 06:14:50,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fb824f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:14:50, skipping insertion in model container [2022-01-10 06:14:50,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:49" (2/3) ... [2022-01-10 06:14:50,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fb824f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:14:50, skipping insertion in model container [2022-01-10 06:14:50,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:14:50" (3/3) ... [2022-01-10 06:14:50,835 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2022-01-10 06:14:50,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:14:50,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:14:50,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:14:50,890 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 06:14:50,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:14:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 409 states have (on average 1.7163814180929096) internal successors, (702), 430 states have internal predecessors, (702), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:14:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:14:50,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:50,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:50,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash 998203465, now seen corresponding path program 1 times [2022-01-10 06:14:50,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758649682] [2022-01-10 06:14:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:50,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:50,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:50,959 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 06:14:50,960 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 06:14:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:14:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:51,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:51,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:51,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758649682] [2022-01-10 06:14:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758649682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:51,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:14:51,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7010113] [2022-01-10 06:14:51,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:51,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:14:51,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:51,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:14:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:14:51,446 INFO L87 Difference]: Start difference. First operand has 517 states, 409 states have (on average 1.7163814180929096) internal successors, (702), 430 states have internal predecessors, (702), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:14:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:51,503 INFO L93 Difference]: Finished difference Result 538 states and 904 transitions. [2022-01-10 06:14:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:14:51,505 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 74 [2022-01-10 06:14:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:51,519 INFO L225 Difference]: With dead ends: 538 [2022-01-10 06:14:51,519 INFO L226 Difference]: Without dead ends: 509 [2022-01-10 06:14:51,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:14:51,524 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:51,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-10 06:14:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-01-10 06:14:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.7146401985111663) internal successors, (691), 422 states have internal predecessors, (691), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 858 transitions. [2022-01-10 06:14:51,579 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 858 transitions. Word has length 74 [2022-01-10 06:14:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:51,580 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 858 transitions. [2022-01-10 06:14:51,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:14:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 858 transitions. [2022-01-10 06:14:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:14:51,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:51,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:51,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:14:51,799 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 06:14:51,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1118211112, now seen corresponding path program 1 times [2022-01-10 06:14:51,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:51,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441954831] [2022-01-10 06:14:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:51,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:51,802 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 06:14:51,804 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 06:14:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:52,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:52,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:52,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441954831] [2022-01-10 06:14:52,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441954831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:52,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:52,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104485146] [2022-01-10 06:14:52,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:52,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:52,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:52,195 INFO L87 Difference]: Start difference. First operand 509 states and 858 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:52,271 INFO L93 Difference]: Finished difference Result 1000 states and 1692 transitions. [2022-01-10 06:14:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:52,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2022-01-10 06:14:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:52,276 INFO L225 Difference]: With dead ends: 1000 [2022-01-10 06:14:52,276 INFO L226 Difference]: Without dead ends: 509 [2022-01-10 06:14:52,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:52,280 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 14 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:52,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2530 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-10 06:14:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-01-10 06:14:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.7121588089330024) internal successors, (690), 422 states have internal predecessors, (690), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 857 transitions. [2022-01-10 06:14:52,300 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 857 transitions. Word has length 76 [2022-01-10 06:14:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:52,300 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 857 transitions. [2022-01-10 06:14:52,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 857 transitions. [2022-01-10 06:14:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:14:52,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:52,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:52,315 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 06:14:52,507 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 06:14:52,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1404423990, now seen corresponding path program 1 times [2022-01-10 06:14:52,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:52,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35023251] [2022-01-10 06:14:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:52,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:52,511 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 06:14:52,512 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 06:14:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:52,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:52,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:52,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:52,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35023251] [2022-01-10 06:14:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35023251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:52,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:52,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:52,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018643198] [2022-01-10 06:14:52,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:52,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:52,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:52,852 INFO L87 Difference]: Start difference. First operand 509 states and 857 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:52,907 INFO L93 Difference]: Finished difference Result 1000 states and 1691 transitions. [2022-01-10 06:14:52,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:52,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-01-10 06:14:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:52,912 INFO L225 Difference]: With dead ends: 1000 [2022-01-10 06:14:52,912 INFO L226 Difference]: Without dead ends: 509 [2022-01-10 06:14:52,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:52,916 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 12 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:52,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2530 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-10 06:14:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-01-10 06:14:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.7096774193548387) internal successors, (689), 422 states have internal predecessors, (689), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 856 transitions. [2022-01-10 06:14:52,953 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 856 transitions. Word has length 77 [2022-01-10 06:14:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:52,954 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 856 transitions. [2022-01-10 06:14:52,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 856 transitions. [2022-01-10 06:14:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:14:52,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:52,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:52,972 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 06:14:53,172 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 06:14:53,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2107052268, now seen corresponding path program 1 times [2022-01-10 06:14:53,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:53,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283325133] [2022-01-10 06:14:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:53,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:53,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:53,175 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 06:14:53,175 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 06:14:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:53,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:53,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:53,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:53,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:53,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283325133] [2022-01-10 06:14:53,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283325133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:53,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:53,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:53,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826270475] [2022-01-10 06:14:53,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:53,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:53,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:53,490 INFO L87 Difference]: Start difference. First operand 509 states and 856 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:53,525 INFO L93 Difference]: Finished difference Result 1000 states and 1690 transitions. [2022-01-10 06:14:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:53,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2022-01-10 06:14:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:53,531 INFO L225 Difference]: With dead ends: 1000 [2022-01-10 06:14:53,531 INFO L226 Difference]: Without dead ends: 509 [2022-01-10 06:14:53,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:53,537 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 10 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:53,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2530 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-10 06:14:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-01-10 06:14:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.7071960297766748) internal successors, (688), 422 states have internal predecessors, (688), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 855 transitions. [2022-01-10 06:14:53,556 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 855 transitions. Word has length 78 [2022-01-10 06:14:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:53,556 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 855 transitions. [2022-01-10 06:14:53,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 855 transitions. [2022-01-10 06:14:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:14:53,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:53,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:53,572 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 06:14:53,769 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 06:14:53,769 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 597547634, now seen corresponding path program 1 times [2022-01-10 06:14:53,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:53,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596252738] [2022-01-10 06:14:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:53,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:53,772 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 06:14:53,772 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 06:14:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:53,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:53,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:54,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:54,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596252738] [2022-01-10 06:14:54,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596252738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:54,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:54,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:54,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883709238] [2022-01-10 06:14:54,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:54,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:54,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:54,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:54,075 INFO L87 Difference]: Start difference. First operand 509 states and 855 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:54,108 INFO L93 Difference]: Finished difference Result 1000 states and 1689 transitions. [2022-01-10 06:14:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-01-10 06:14:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:54,111 INFO L225 Difference]: With dead ends: 1000 [2022-01-10 06:14:54,111 INFO L226 Difference]: Without dead ends: 509 [2022-01-10 06:14:54,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:54,113 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 8 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:54,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2530 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-10 06:14:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-01-10 06:14:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.7047146401985112) internal successors, (687), 422 states have internal predecessors, (687), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 854 transitions. [2022-01-10 06:14:54,124 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 854 transitions. Word has length 79 [2022-01-10 06:14:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:54,124 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 854 transitions. [2022-01-10 06:14:54,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 854 transitions. [2022-01-10 06:14:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 06:14:54,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:54,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:54,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:54,336 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 06:14:54,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1567987120, now seen corresponding path program 1 times [2022-01-10 06:14:54,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:54,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290584817] [2022-01-10 06:14:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:54,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:54,339 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 06:14:54,341 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 06:14:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:54,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:54,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290584817] [2022-01-10 06:14:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290584817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:54,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:54,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:54,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395156856] [2022-01-10 06:14:54,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:54,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:54,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:54,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:54,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:54,674 INFO L87 Difference]: Start difference. First operand 509 states and 854 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:54,706 INFO L93 Difference]: Finished difference Result 1000 states and 1688 transitions. [2022-01-10 06:14:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-01-10 06:14:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:54,709 INFO L225 Difference]: With dead ends: 1000 [2022-01-10 06:14:54,709 INFO L226 Difference]: Without dead ends: 509 [2022-01-10 06:14:54,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:54,711 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 6 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:54,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2530 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:54,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-10 06:14:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-01-10 06:14:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.7022332506203475) internal successors, (686), 422 states have internal predecessors, (686), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 853 transitions. [2022-01-10 06:14:54,723 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 853 transitions. Word has length 80 [2022-01-10 06:14:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:54,723 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 853 transitions. [2022-01-10 06:14:54,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 853 transitions. [2022-01-10 06:14:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:14:54,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:54,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:54,752 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 06:14:54,936 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 06:14:54,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2031413645, now seen corresponding path program 1 times [2022-01-10 06:14:54,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:54,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812446242] [2022-01-10 06:14:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:54,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:54,938 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 06:14:54,940 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 06:14:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:55,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:55,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:55,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812446242] [2022-01-10 06:14:55,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812446242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:55,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:55,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:55,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515931115] [2022-01-10 06:14:55,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:55,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:55,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:55,258 INFO L87 Difference]: Start difference. First operand 509 states and 853 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:55,288 INFO L93 Difference]: Finished difference Result 1000 states and 1687 transitions. [2022-01-10 06:14:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-01-10 06:14:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:55,291 INFO L225 Difference]: With dead ends: 1000 [2022-01-10 06:14:55,291 INFO L226 Difference]: Without dead ends: 509 [2022-01-10 06:14:55,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:55,293 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 4 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:55,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2530 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-10 06:14:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-01-10 06:14:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.6997518610421836) internal successors, (685), 422 states have internal predecessors, (685), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 852 transitions. [2022-01-10 06:14:55,304 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 852 transitions. Word has length 81 [2022-01-10 06:14:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:55,305 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 852 transitions. [2022-01-10 06:14:55,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 852 transitions. [2022-01-10 06:14:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:14:55,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:55,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:55,326 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 06:14:55,517 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 06:14:55,519 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash -88873554, now seen corresponding path program 1 times [2022-01-10 06:14:55,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:55,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95456656] [2022-01-10 06:14:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:55,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:55,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:55,521 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 06:14:55,523 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 06:14:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:14:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:55,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:55,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:55,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95456656] [2022-01-10 06:14:55,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95456656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:55,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:55,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:55,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664249397] [2022-01-10 06:14:55,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:55,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:55,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:55,865 INFO L87 Difference]: Start difference. First operand 509 states and 852 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:14:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:55,933 INFO L93 Difference]: Finished difference Result 960 states and 1611 transitions. [2022-01-10 06:14:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-01-10 06:14:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:55,936 INFO L225 Difference]: With dead ends: 960 [2022-01-10 06:14:55,936 INFO L226 Difference]: Without dead ends: 503 [2022-01-10 06:14:55,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:55,938 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 117 mSDsluCounter, 4102 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4941 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:55,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4941 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-10 06:14:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-01-10 06:14:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 397 states have (on average 1.6926952141057934) internal successors, (672), 416 states have internal predecessors, (672), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 839 transitions. [2022-01-10 06:14:55,949 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 839 transitions. Word has length 81 [2022-01-10 06:14:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 839 transitions. [2022-01-10 06:14:55,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:14:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 839 transitions. [2022-01-10 06:14:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:14:55,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:55,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:55,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:56,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:56,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1421004449, now seen corresponding path program 1 times [2022-01-10 06:14:56,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:56,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171642039] [2022-01-10 06:14:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:56,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:56,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:56,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:56,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:14:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:56,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:56,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:56,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171642039] [2022-01-10 06:14:56,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171642039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:56,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:56,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:56,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079317151] [2022-01-10 06:14:56,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:56,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:56,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:56,500 INFO L87 Difference]: Start difference. First operand 503 states and 839 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:56,590 INFO L93 Difference]: Finished difference Result 954 states and 1598 transitions. [2022-01-10 06:14:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-01-10 06:14:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:56,599 INFO L225 Difference]: With dead ends: 954 [2022-01-10 06:14:56,599 INFO L226 Difference]: Without dead ends: 503 [2022-01-10 06:14:56,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:56,603 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 90 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:56,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 2344 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-10 06:14:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-01-10 06:14:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 397 states have (on average 1.6826196473551638) internal successors, (668), 416 states have internal predecessors, (668), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 835 transitions. [2022-01-10 06:14:56,613 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 835 transitions. Word has length 82 [2022-01-10 06:14:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:56,614 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 835 transitions. [2022-01-10 06:14:56,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 835 transitions. [2022-01-10 06:14:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:14:56,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:56,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:56,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:56,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:56,827 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1102053519, now seen corresponding path program 1 times [2022-01-10 06:14:56,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:56,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675347269] [2022-01-10 06:14:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:56,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:56,829 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:56,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:14:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:57,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:57,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:57,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675347269] [2022-01-10 06:14:57,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675347269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:57,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:57,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:57,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976485941] [2022-01-10 06:14:57,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:57,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:57,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:57,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:57,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:57,146 INFO L87 Difference]: Start difference. First operand 503 states and 835 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:57,230 INFO L93 Difference]: Finished difference Result 954 states and 1594 transitions. [2022-01-10 06:14:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-01-10 06:14:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:57,234 INFO L225 Difference]: With dead ends: 954 [2022-01-10 06:14:57,235 INFO L226 Difference]: Without dead ends: 503 [2022-01-10 06:14:57,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:57,237 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 85 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:57,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2344 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-10 06:14:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-01-10 06:14:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 397 states have (on average 1.672544080604534) internal successors, (664), 416 states have internal predecessors, (664), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 831 transitions. [2022-01-10 06:14:57,250 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 831 transitions. Word has length 83 [2022-01-10 06:14:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:57,250 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 831 transitions. [2022-01-10 06:14:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 831 transitions. [2022-01-10 06:14:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:14:57,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:57,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:57,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:57,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:57,466 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1144853926, now seen corresponding path program 1 times [2022-01-10 06:14:57,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:57,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78564439] [2022-01-10 06:14:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:57,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:57,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:57,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:14:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:57,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:57,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78564439] [2022-01-10 06:14:57,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78564439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:57,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:57,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:57,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872769222] [2022-01-10 06:14:57,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:57,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:57,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:57,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:57,783 INFO L87 Difference]: Start difference. First operand 503 states and 831 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:57,883 INFO L93 Difference]: Finished difference Result 954 states and 1590 transitions. [2022-01-10 06:14:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2022-01-10 06:14:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:57,886 INFO L225 Difference]: With dead ends: 954 [2022-01-10 06:14:57,886 INFO L226 Difference]: Without dead ends: 503 [2022-01-10 06:14:57,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:57,888 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 80 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:57,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 2344 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:14:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-10 06:14:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-01-10 06:14:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 397 states have (on average 1.6624685138539044) internal successors, (660), 416 states have internal predecessors, (660), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 827 transitions. [2022-01-10 06:14:57,900 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 827 transitions. Word has length 84 [2022-01-10 06:14:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:57,901 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 827 transitions. [2022-01-10 06:14:57,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 827 transitions. [2022-01-10 06:14:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:14:57,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:57,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:57,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:58,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:58,115 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1311609382, now seen corresponding path program 1 times [2022-01-10 06:14:58,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264236632] [2022-01-10 06:14:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:58,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:58,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:58,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:58,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:14:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:14:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:58,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:58,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:58,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264236632] [2022-01-10 06:14:58,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264236632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:58,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:58,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:14:58,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688937118] [2022-01-10 06:14:58,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:58,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:14:58,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:14:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:14:58,464 INFO L87 Difference]: Start difference. First operand 503 states and 827 transitions. Second operand has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:14:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:58,535 INFO L93 Difference]: Finished difference Result 954 states and 1586 transitions. [2022-01-10 06:14:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:14:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-01-10 06:14:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:58,552 INFO L225 Difference]: With dead ends: 954 [2022-01-10 06:14:58,552 INFO L226 Difference]: Without dead ends: 482 [2022-01-10 06:14:58,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:14:58,556 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 110 mSDsluCounter, 3991 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 4806 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:58,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 4806 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-10 06:14:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2022-01-10 06:14:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 376 states have (on average 1.6648936170212767) internal successors, (626), 395 states have internal predecessors, (626), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 793 transitions. [2022-01-10 06:14:58,568 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 793 transitions. Word has length 84 [2022-01-10 06:14:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:58,569 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 793 transitions. [2022-01-10 06:14:58,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:14:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 793 transitions. [2022-01-10 06:14:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 06:14:58,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:58,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:58,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:58,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:58,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:58,783 INFO L85 PathProgramCache]: Analyzing trace with hash 936833814, now seen corresponding path program 1 times [2022-01-10 06:14:58,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:58,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728354346] [2022-01-10 06:14:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:58,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:58,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:58,784 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:58,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:14:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:59,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:59,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:59,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728354346] [2022-01-10 06:14:59,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728354346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:59,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:59,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:59,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385888630] [2022-01-10 06:14:59,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:59,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:59,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:59,086 INFO L87 Difference]: Start difference. First operand 482 states and 793 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:59,135 INFO L93 Difference]: Finished difference Result 933 states and 1552 transitions. [2022-01-10 06:14:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-01-10 06:14:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:59,139 INFO L225 Difference]: With dead ends: 933 [2022-01-10 06:14:59,139 INFO L226 Difference]: Without dead ends: 482 [2022-01-10 06:14:59,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:59,142 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 41 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:59,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2330 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-10 06:14:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2022-01-10 06:14:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 376 states have (on average 1.6622340425531914) internal successors, (625), 395 states have internal predecessors, (625), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 792 transitions. [2022-01-10 06:14:59,155 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 792 transitions. Word has length 85 [2022-01-10 06:14:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:59,155 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 792 transitions. [2022-01-10 06:14:59,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 792 transitions. [2022-01-10 06:14:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 06:14:59,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:59,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:59,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:59,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,367 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1935470763, now seen corresponding path program 1 times [2022-01-10 06:14:59,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:59,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480517218] [2022-01-10 06:14:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:59,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:59,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:59,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:14:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:59,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:59,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:59,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480517218] [2022-01-10 06:14:59,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480517218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:59,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:59,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:59,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438931300] [2022-01-10 06:14:59,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:59,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:59,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:59,695 INFO L87 Difference]: Start difference. First operand 482 states and 792 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:59,730 INFO L93 Difference]: Finished difference Result 933 states and 1551 transitions. [2022-01-10 06:14:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2022-01-10 06:14:59,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:59,734 INFO L225 Difference]: With dead ends: 933 [2022-01-10 06:14:59,734 INFO L226 Difference]: Without dead ends: 482 [2022-01-10 06:14:59,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:59,736 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 39 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:59,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2330 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-10 06:14:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2022-01-10 06:14:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 376 states have (on average 1.6595744680851063) internal successors, (624), 395 states have internal predecessors, (624), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 791 transitions. [2022-01-10 06:14:59,748 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 791 transitions. Word has length 86 [2022-01-10 06:14:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:59,748 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 791 transitions. [2022-01-10 06:14:59,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 791 transitions. [2022-01-10 06:14:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:14:59,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:59,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:59,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:59,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,961 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1685770939, now seen corresponding path program 1 times [2022-01-10 06:14:59,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:59,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228975552] [2022-01-10 06:14:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:59,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:59,964 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:59,965 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 06:15:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:00,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:00,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:00,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:00,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228975552] [2022-01-10 06:15:00,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228975552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:00,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:00,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:00,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715344772] [2022-01-10 06:15:00,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:00,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:00,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:00,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:00,314 INFO L87 Difference]: Start difference. First operand 482 states and 791 transitions. Second operand has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:00,398 INFO L93 Difference]: Finished difference Result 927 states and 1539 transitions. [2022-01-10 06:15:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:15:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 87 [2022-01-10 06:15:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:00,401 INFO L225 Difference]: With dead ends: 927 [2022-01-10 06:15:00,401 INFO L226 Difference]: Without dead ends: 482 [2022-01-10 06:15:00,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:15:00,404 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 31 mSDsluCounter, 4634 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 5410 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:00,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 5410 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-10 06:15:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2022-01-10 06:15:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 376 states have (on average 1.6569148936170213) internal successors, (623), 395 states have internal predecessors, (623), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 790 transitions. [2022-01-10 06:15:00,416 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 790 transitions. Word has length 87 [2022-01-10 06:15:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:00,416 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 790 transitions. [2022-01-10 06:15:00,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 790 transitions. [2022-01-10 06:15:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:15:00,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:00,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:00,429 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 06:15:00,628 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 06:15:00,629 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 863262848, now seen corresponding path program 1 times [2022-01-10 06:15:00,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:00,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158417896] [2022-01-10 06:15:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:00,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:00,631 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 06:15:00,632 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 06:15:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:15:00,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:01,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:01,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158417896] [2022-01-10 06:15:01,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158417896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:01,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:01,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:15:01,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123295883] [2022-01-10 06:15:01,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:01,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:15:01,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:01,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:15:01,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:15:01,124 INFO L87 Difference]: Start difference. First operand 482 states and 790 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:03,174 INFO L93 Difference]: Finished difference Result 1056 states and 1782 transitions. [2022-01-10 06:15:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 88 [2022-01-10 06:15:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:03,178 INFO L225 Difference]: With dead ends: 1056 [2022-01-10 06:15:03,178 INFO L226 Difference]: Without dead ends: 619 [2022-01-10 06:15:03,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:15:03,180 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 1361 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 3078 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 3606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 3078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:03,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 2775 Invalid, 3606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 3078 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 06:15:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-10 06:15:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 486. [2022-01-10 06:15:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 379 states have (on average 1.6517150395778364) internal successors, (626), 398 states have internal predecessors, (626), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (97), 80 states have call predecessors, (97), 81 states have call successors, (97) [2022-01-10 06:15:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 809 transitions. [2022-01-10 06:15:03,200 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 809 transitions. Word has length 88 [2022-01-10 06:15:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:03,200 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 809 transitions. [2022-01-10 06:15:03,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 809 transitions. [2022-01-10 06:15:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:15:03,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:03,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:03,229 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 06:15:03,411 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 06:15:03,411 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash 659821929, now seen corresponding path program 1 times [2022-01-10 06:15:03,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:03,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978936043] [2022-01-10 06:15:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:03,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:03,413 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 06:15:03,415 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 06:15:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:15:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:03,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:03,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978936043] [2022-01-10 06:15:03,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978936043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:03,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:03,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:03,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64707232] [2022-01-10 06:15:03,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:03,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:03,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:03,809 INFO L87 Difference]: Start difference. First operand 486 states and 809 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:06,881 INFO L93 Difference]: Finished difference Result 1730 states and 2977 transitions. [2022-01-10 06:15:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:15:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2022-01-10 06:15:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:06,897 INFO L225 Difference]: With dead ends: 1730 [2022-01-10 06:15:06,897 INFO L226 Difference]: Without dead ends: 1289 [2022-01-10 06:15:06,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:15:06,900 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 2153 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 3902 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2220 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 4526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 3902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:06,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2220 Valid, 3268 Invalid, 4526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 3902 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 06:15:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-01-10 06:15:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1232. [2022-01-10 06:15:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 957 states have (on average 1.6666666666666667) internal successors, (1595), 1005 states have internal predecessors, (1595), 223 states have call successors, (223), 51 states have call predecessors, (223), 51 states have return successors, (238), 212 states have call predecessors, (238), 218 states have call successors, (238) [2022-01-10 06:15:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 2056 transitions. [2022-01-10 06:15:06,944 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 2056 transitions. Word has length 89 [2022-01-10 06:15:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:06,944 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 2056 transitions. [2022-01-10 06:15:06,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 2056 transitions. [2022-01-10 06:15:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 06:15:06,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:06,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:06,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:15:07,155 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 06:15:07,156 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1914392595, now seen corresponding path program 1 times [2022-01-10 06:15:07,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:07,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169490039] [2022-01-10 06:15:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:07,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:07,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:07,158 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 06:15:07,159 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 06:15:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:15:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:07,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:07,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:07,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169490039] [2022-01-10 06:15:07,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169490039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:07,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:07,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:07,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956493317] [2022-01-10 06:15:07,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:07,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:07,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:07,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:07,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:07,540 INFO L87 Difference]: Start difference. First operand 1232 states and 2056 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:09,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:09,989 INFO L93 Difference]: Finished difference Result 3398 states and 5754 transitions. [2022-01-10 06:15:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:15:09,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 91 [2022-01-10 06:15:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:10,000 INFO L225 Difference]: With dead ends: 3398 [2022-01-10 06:15:10,000 INFO L226 Difference]: Without dead ends: 2513 [2022-01-10 06:15:10,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:15:10,004 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 2490 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 2799 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2561 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 3334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:10,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2561 Valid, 2357 Invalid, 3334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2799 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 06:15:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2022-01-10 06:15:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2307. [2022-01-10 06:15:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 1796 states have (on average 1.670378619153675) internal successors, (3000), 1886 states have internal predecessors, (3000), 407 states have call successors, (407), 91 states have call predecessors, (407), 103 states have return successors, (481), 391 states have call predecessors, (481), 402 states have call successors, (481) [2022-01-10 06:15:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3888 transitions. [2022-01-10 06:15:10,074 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3888 transitions. Word has length 91 [2022-01-10 06:15:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:10,074 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3888 transitions. [2022-01-10 06:15:10,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3888 transitions. [2022-01-10 06:15:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:15:10,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:10,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:10,089 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 06:15:10,287 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 06:15:10,287 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1246055183, now seen corresponding path program 1 times [2022-01-10 06:15:10,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:10,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658917536] [2022-01-10 06:15:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:10,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:10,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:10,289 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 06:15:10,291 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 06:15:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:10,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:15:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:10,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:10,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:10,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658917536] [2022-01-10 06:15:10,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658917536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:10,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:10,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:15:10,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946610725] [2022-01-10 06:15:10,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:10,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:15:10,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:15:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:15:10,716 INFO L87 Difference]: Start difference. First operand 2307 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:15:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:13,901 INFO L93 Difference]: Finished difference Result 4782 states and 8075 transitions. [2022-01-10 06:15:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:15:13,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 96 [2022-01-10 06:15:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:13,914 INFO L225 Difference]: With dead ends: 4782 [2022-01-10 06:15:13,914 INFO L226 Difference]: Without dead ends: 2822 [2022-01-10 06:15:13,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:15:13,923 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 1853 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 4526 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 4980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 4526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:13,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1921 Valid, 3117 Invalid, 4980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 4526 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 06:15:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2022-01-10 06:15:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2556. [2022-01-10 06:15:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 1977 states have (on average 1.642893272635306) internal successors, (3248), 2082 states have internal predecessors, (3248), 449 states have call successors, (449), 111 states have call predecessors, (449), 129 states have return successors, (562), 424 states have call predecessors, (562), 444 states have call successors, (562) [2022-01-10 06:15:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 4259 transitions. [2022-01-10 06:15:14,031 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 4259 transitions. Word has length 96 [2022-01-10 06:15:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:14,031 INFO L470 AbstractCegarLoop]: Abstraction has 2556 states and 4259 transitions. [2022-01-10 06:15:14,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:15:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 4259 transitions. [2022-01-10 06:15:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:15:14,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:14,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:14,061 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 06:15:14,251 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 06:15:14,251 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1745206679, now seen corresponding path program 1 times [2022-01-10 06:15:14,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:14,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057343081] [2022-01-10 06:15:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:14,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:14,253 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 06:15:14,255 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 06:15:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:14,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:14,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:14,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057343081] [2022-01-10 06:15:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057343081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:14,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:14,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:14,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659775954] [2022-01-10 06:15:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:14,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:14,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:14,569 INFO L87 Difference]: Start difference. First operand 2556 states and 4259 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:15:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:14,712 INFO L93 Difference]: Finished difference Result 5037 states and 8494 transitions. [2022-01-10 06:15:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-01-10 06:15:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:14,723 INFO L225 Difference]: With dead ends: 5037 [2022-01-10 06:15:14,723 INFO L226 Difference]: Without dead ends: 2556 [2022-01-10 06:15:14,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 06:15:14,731 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 234 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:14,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 2212 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-01-10 06:15:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2556. [2022-01-10 06:15:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 1977 states have (on average 1.6155791603439555) internal successors, (3194), 2082 states have internal predecessors, (3194), 449 states have call successors, (449), 111 states have call predecessors, (449), 129 states have return successors, (562), 424 states have call predecessors, (562), 444 states have call successors, (562) [2022-01-10 06:15:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 4205 transitions. [2022-01-10 06:15:14,801 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 4205 transitions. Word has length 103 [2022-01-10 06:15:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:14,802 INFO L470 AbstractCegarLoop]: Abstraction has 2556 states and 4205 transitions. [2022-01-10 06:15:14,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:15:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 4205 transitions. [2022-01-10 06:15:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:15:14,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:14,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:14,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 06:15:15,014 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 06:15:15,015 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1888746518, now seen corresponding path program 1 times [2022-01-10 06:15:15,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:15,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466118317] [2022-01-10 06:15:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:15,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:15,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:15,016 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 06:15:15,017 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 06:15:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:15:15,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:15,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466118317] [2022-01-10 06:15:15,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466118317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:15,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:15,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:15,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268714063] [2022-01-10 06:15:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:15,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:15,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:15,442 INFO L87 Difference]: Start difference. First operand 2556 states and 4205 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:15:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:17,684 INFO L93 Difference]: Finished difference Result 5041 states and 8327 transitions. [2022-01-10 06:15:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:15:17,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2022-01-10 06:15:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:17,705 INFO L225 Difference]: With dead ends: 5041 [2022-01-10 06:15:17,706 INFO L226 Difference]: Without dead ends: 2889 [2022-01-10 06:15:17,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:15:17,718 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 1922 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 2794 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:17,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1996 Valid, 2092 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2794 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 06:15:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2022-01-10 06:15:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2673. [2022-01-10 06:15:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2063 states have (on average 1.5976732913233156) internal successors, (3296), 2179 states have internal predecessors, (3296), 457 states have call successors, (457), 124 states have call predecessors, (457), 152 states have return successors, (607), 432 states have call predecessors, (607), 452 states have call successors, (607) [2022-01-10 06:15:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 4360 transitions. [2022-01-10 06:15:17,826 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 4360 transitions. Word has length 108 [2022-01-10 06:15:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:17,827 INFO L470 AbstractCegarLoop]: Abstraction has 2673 states and 4360 transitions. [2022-01-10 06:15:17,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:15:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 4360 transitions. [2022-01-10 06:15:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:15:17,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:17,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:17,855 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 06:15:18,035 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 06:15:18,035 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1006931789, now seen corresponding path program 1 times [2022-01-10 06:15:18,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222679933] [2022-01-10 06:15:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:18,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:18,038 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 06:15:18,039 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 06:15:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:18,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:15:18,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:15:18,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:18,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:18,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222679933] [2022-01-10 06:15:18,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222679933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:18,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:18,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:18,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577549836] [2022-01-10 06:15:18,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:18,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:18,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:18,529 INFO L87 Difference]: Start difference. First operand 2673 states and 4360 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:21,239 INFO L93 Difference]: Finished difference Result 5202 states and 8506 transitions. [2022-01-10 06:15:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:15:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-01-10 06:15:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:21,268 INFO L225 Difference]: With dead ends: 5202 [2022-01-10 06:15:21,268 INFO L226 Difference]: Without dead ends: 2932 [2022-01-10 06:15:21,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:15:21,276 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 1509 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 3613 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:21,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1578 Valid, 2574 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3613 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 06:15:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2022-01-10 06:15:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2641. [2022-01-10 06:15:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2039 states have (on average 1.5958803334968121) internal successors, (3254), 2152 states have internal predecessors, (3254), 452 states have call successors, (452), 124 states have call predecessors, (452), 149 states have return successors, (582), 427 states have call predecessors, (582), 447 states have call successors, (582) [2022-01-10 06:15:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4288 transitions. [2022-01-10 06:15:21,364 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4288 transitions. Word has length 113 [2022-01-10 06:15:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:21,365 INFO L470 AbstractCegarLoop]: Abstraction has 2641 states and 4288 transitions. [2022-01-10 06:15:21,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4288 transitions. [2022-01-10 06:15:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:15:21,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:21,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:21,391 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 06:15:21,578 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 06:15:21,578 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash 872918283, now seen corresponding path program 1 times [2022-01-10 06:15:21,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:21,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670073649] [2022-01-10 06:15:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:21,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:21,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:21,597 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:21,628 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 06:15:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:15:21,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:15:22,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:22,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670073649] [2022-01-10 06:15:22,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670073649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:22,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:22,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:22,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119268778] [2022-01-10 06:15:22,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:22,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:22,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:22,127 INFO L87 Difference]: Start difference. First operand 2641 states and 4288 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:24,344 INFO L93 Difference]: Finished difference Result 5860 states and 9615 transitions. [2022-01-10 06:15:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:15:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-01-10 06:15:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:24,361 INFO L225 Difference]: With dead ends: 5860 [2022-01-10 06:15:24,361 INFO L226 Difference]: Without dead ends: 3618 [2022-01-10 06:15:24,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:15:24,369 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 1654 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:24,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 1872 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 06:15:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2022-01-10 06:15:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3429. [2022-01-10 06:15:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 2640 states have (on average 1.596969696969697) internal successors, (4216), 2789 states have internal predecessors, (4216), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 5595 transitions. [2022-01-10 06:15:24,472 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 5595 transitions. Word has length 113 [2022-01-10 06:15:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:24,472 INFO L470 AbstractCegarLoop]: Abstraction has 3429 states and 5595 transitions. [2022-01-10 06:15:24,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 5595 transitions. [2022-01-10 06:15:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:15:24,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:24,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:24,487 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 06:15:24,679 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 06:15:24,679 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:24,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2005795480, now seen corresponding path program 1 times [2022-01-10 06:15:24,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:24,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553097015] [2022-01-10 06:15:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:24,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:24,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:24,681 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 06:15:24,682 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 06:15:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:15:25,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:25,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:25,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553097015] [2022-01-10 06:15:25,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553097015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:25,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:25,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:25,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845584472] [2022-01-10 06:15:25,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:25,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:25,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:25,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:25,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:25,076 INFO L87 Difference]: Start difference. First operand 3429 states and 5595 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:15:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:25,534 INFO L93 Difference]: Finished difference Result 3512 states and 5730 transitions. [2022-01-10 06:15:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:15:25,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2022-01-10 06:15:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:25,547 INFO L225 Difference]: With dead ends: 3512 [2022-01-10 06:15:25,548 INFO L226 Difference]: Without dead ends: 3497 [2022-01-10 06:15:25,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:25,549 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 760 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:25,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1989 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:15:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2022-01-10 06:15:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3435. [2022-01-10 06:15:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 2646 states have (on average 1.5956160241874529) internal successors, (4222), 2795 states have internal predecessors, (4222), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5601 transitions. [2022-01-10 06:15:25,645 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5601 transitions. Word has length 114 [2022-01-10 06:15:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:25,645 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 5601 transitions. [2022-01-10 06:15:25,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:15:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5601 transitions. [2022-01-10 06:15:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 06:15:25,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:25,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:25,658 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 06:15:25,858 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 06:15:25,858 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1886235315, now seen corresponding path program 1 times [2022-01-10 06:15:25,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:25,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534110052] [2022-01-10 06:15:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:25,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:25,860 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 06:15:25,861 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 06:15:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:15:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:15:26,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:26,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:26,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534110052] [2022-01-10 06:15:26,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534110052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:26,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:26,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:15:26,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490427558] [2022-01-10 06:15:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:26,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:26,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:26,221 INFO L87 Difference]: Start difference. First operand 3435 states and 5601 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, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:15:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:26,291 INFO L93 Difference]: Finished difference Result 3454 states and 5625 transitions. [2022-01-10 06:15:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:26,291 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, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 120 [2022-01-10 06:15:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:26,304 INFO L225 Difference]: With dead ends: 3454 [2022-01-10 06:15:26,304 INFO L226 Difference]: Without dead ends: 3439 [2022-01-10 06:15:26,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:15:26,307 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 37 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:26,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3080 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2022-01-10 06:15:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 3435. [2022-01-10 06:15:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 2646 states have (on average 1.5941043083900226) internal successors, (4218), 2795 states have internal predecessors, (4218), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5597 transitions. [2022-01-10 06:15:26,411 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5597 transitions. Word has length 120 [2022-01-10 06:15:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:26,411 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 5597 transitions. [2022-01-10 06:15:26,411 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, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:15:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5597 transitions. [2022-01-10 06:15:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:15:26,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:26,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:26,426 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 06:15:26,624 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 06:15:26,625 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:26,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash -742193045, now seen corresponding path program 1 times [2022-01-10 06:15:26,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:26,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449566687] [2022-01-10 06:15:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:26,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:26,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:26,627 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 06:15:26,628 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 06:15:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:15:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:15:27,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:27,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449566687] [2022-01-10 06:15:27,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449566687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:27,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:27,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:27,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368261403] [2022-01-10 06:15:27,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:27,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:27,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:27,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:27,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:27,097 INFO L87 Difference]: Start difference. First operand 3435 states and 5597 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:28,433 INFO L93 Difference]: Finished difference Result 6841 states and 11198 transitions. [2022-01-10 06:15:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2022-01-10 06:15:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:28,445 INFO L225 Difference]: With dead ends: 6841 [2022-01-10 06:15:28,445 INFO L226 Difference]: Without dead ends: 3459 [2022-01-10 06:15:28,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:15:28,452 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 1190 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:28,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 1845 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 06:15:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2022-01-10 06:15:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3435. [2022-01-10 06:15:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 2646 states have (on average 1.5925925925925926) internal successors, (4214), 2795 states have internal predecessors, (4214), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5593 transitions. [2022-01-10 06:15:28,566 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5593 transitions. Word has length 131 [2022-01-10 06:15:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:28,566 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 5593 transitions. [2022-01-10 06:15:28,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5593 transitions. [2022-01-10 06:15:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 06:15:28,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:28,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:28,581 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 06:15:28,782 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 06:15:28,782 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1433321322, now seen corresponding path program 1 times [2022-01-10 06:15:28,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:28,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203497308] [2022-01-10 06:15:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:28,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:28,785 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 06:15:28,785 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 06:15:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:15:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:15:29,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:29,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:29,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203497308] [2022-01-10 06:15:29,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203497308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:29,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:29,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:15:29,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351362476] [2022-01-10 06:15:29,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:29,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:29,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:29,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:29,223 INFO L87 Difference]: Start difference. First operand 3435 states and 5593 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:31,199 INFO L93 Difference]: Finished difference Result 11724 states and 19346 transitions. [2022-01-10 06:15:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 132 [2022-01-10 06:15:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:31,232 INFO L225 Difference]: With dead ends: 11724 [2022-01-10 06:15:31,232 INFO L226 Difference]: Without dead ends: 8342 [2022-01-10 06:15:31,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 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 06:15:31,245 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 1912 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:31,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 1737 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-10 06:15:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2022-01-10 06:15:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 8044. [2022-01-10 06:15:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 6097 states have (on average 1.5852058389371821) internal successors, (9665), 6468 states have internal predecessors, (9665), 1510 states have call successors, (1510), 358 states have call predecessors, (1510), 436 states have return successors, (2080), 1424 states have call predecessors, (2080), 1505 states have call successors, (2080) [2022-01-10 06:15:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 13255 transitions. [2022-01-10 06:15:31,560 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 13255 transitions. Word has length 132 [2022-01-10 06:15:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:31,560 INFO L470 AbstractCegarLoop]: Abstraction has 8044 states and 13255 transitions. [2022-01-10 06:15:31,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 13255 transitions. [2022-01-10 06:15:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 06:15:31,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:31,564 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:31,574 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 06:15:31,774 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 06:15:31,774 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:31,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash -62426954, now seen corresponding path program 1 times [2022-01-10 06:15:31,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:31,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909354360] [2022-01-10 06:15:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:31,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:31,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:31,776 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 06:15:31,778 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 06:15:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:15:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:15:32,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:32,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909354360] [2022-01-10 06:15:32,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909354360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:32,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:32,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:15:32,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637122242] [2022-01-10 06:15:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:32,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:32,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:32,131 INFO L87 Difference]: Start difference. First operand 8044 states and 13255 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-01-10 06:15:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:32,382 INFO L93 Difference]: Finished difference Result 8209 states and 13499 transitions. [2022-01-10 06:15:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:32,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2022-01-10 06:15:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:32,415 INFO L225 Difference]: With dead ends: 8209 [2022-01-10 06:15:32,415 INFO L226 Difference]: Without dead ends: 8194 [2022-01-10 06:15:32,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:32,422 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 66 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 3211 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:32,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 3211 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2022-01-10 06:15:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 8056. [2022-01-10 06:15:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8056 states, 6109 states have (on average 1.5834015387133737) internal successors, (9673), 6480 states have internal predecessors, (9673), 1510 states have call successors, (1510), 358 states have call predecessors, (1510), 436 states have return successors, (2080), 1424 states have call predecessors, (2080), 1505 states have call successors, (2080) [2022-01-10 06:15:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8056 states to 8056 states and 13263 transitions. [2022-01-10 06:15:32,728 INFO L78 Accepts]: Start accepts. Automaton has 8056 states and 13263 transitions. Word has length 140 [2022-01-10 06:15:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:32,728 INFO L470 AbstractCegarLoop]: Abstraction has 8056 states and 13263 transitions. [2022-01-10 06:15:32,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-01-10 06:15:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8056 states and 13263 transitions. [2022-01-10 06:15:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 06:15:32,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:32,732 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:32,759 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 06:15:32,944 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 06:15:32,944 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash -415089072, now seen corresponding path program 1 times [2022-01-10 06:15:32,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:32,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152689773] [2022-01-10 06:15:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:32,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:32,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:32,946 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 06:15:32,948 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 06:15:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:15:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-10 06:15:33,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:15:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-10 06:15:34,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152689773] [2022-01-10 06:15:34,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152689773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:15:34,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:15:34,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-01-10 06:15:34,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725289818] [2022-01-10 06:15:34,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:15:34,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:15:34,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:34,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:15:34,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:15:34,086 INFO L87 Difference]: Start difference. First operand 8056 states and 13263 transitions. Second operand has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 13 states have internal predecessors, (170), 8 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2022-01-10 06:15:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:38,581 INFO L93 Difference]: Finished difference Result 26532 states and 44265 transitions. [2022-01-10 06:15:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:15:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 13 states have internal predecessors, (170), 8 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) Word has length 168 [2022-01-10 06:15:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:38,707 INFO L225 Difference]: With dead ends: 26532 [2022-01-10 06:15:38,707 INFO L226 Difference]: Without dead ends: 18533 [2022-01-10 06:15:38,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:15:38,729 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 4781 mSDsluCounter, 3633 mSDsCounter, 0 mSdLazyCounter, 5978 mSolverCounterSat, 1390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4893 SdHoareTripleChecker+Valid, 5076 SdHoareTripleChecker+Invalid, 7368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1390 IncrementalHoareTripleChecker+Valid, 5978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:38,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4893 Valid, 5076 Invalid, 7368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1390 Valid, 5978 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-10 06:15:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18533 states. [2022-01-10 06:15:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18533 to 18106. [2022-01-10 06:15:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18106 states, 13417 states have (on average 1.5759111574867706) internal successors, (21144), 14276 states have internal predecessors, (21144), 3767 states have call successors, (3767), 712 states have call predecessors, (3767), 921 states have return successors, (5354), 3636 states have call predecessors, (5354), 3762 states have call successors, (5354) [2022-01-10 06:15:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18106 states to 18106 states and 30265 transitions. [2022-01-10 06:15:39,578 INFO L78 Accepts]: Start accepts. Automaton has 18106 states and 30265 transitions. Word has length 168 [2022-01-10 06:15:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:39,579 INFO L470 AbstractCegarLoop]: Abstraction has 18106 states and 30265 transitions. [2022-01-10 06:15:39,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 13 states have internal predecessors, (170), 8 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2022-01-10 06:15:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 18106 states and 30265 transitions. [2022-01-10 06:15:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 06:15:39,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:39,589 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:39,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:39,800 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash -393812569, now seen corresponding path program 1 times [2022-01-10 06:15:39,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:39,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946606561] [2022-01-10 06:15:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:39,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:39,802 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:39,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:15:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:40,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:15:40,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:40,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946606561] [2022-01-10 06:15:40,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946606561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:40,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:40,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:40,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787784506] [2022-01-10 06:15:40,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:40,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:40,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:40,265 INFO L87 Difference]: Start difference. First operand 18106 states and 30265 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:15:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:41,065 INFO L93 Difference]: Finished difference Result 36323 states and 61103 transitions. [2022-01-10 06:15:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:15:41,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 169 [2022-01-10 06:15:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:41,186 INFO L225 Difference]: With dead ends: 36323 [2022-01-10 06:15:41,186 INFO L226 Difference]: Without dead ends: 18294 [2022-01-10 06:15:41,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 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 06:15:41,236 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 18 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:41,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2221 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18294 states. [2022-01-10 06:15:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18294 to 18292. [2022-01-10 06:15:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18292 states, 13573 states have (on average 1.5675237604066898) internal successors, (21276), 14416 states have internal predecessors, (21276), 3755 states have call successors, (3755), 778 states have call predecessors, (3755), 963 states have return successors, (5238), 3616 states have call predecessors, (5238), 3750 states have call successors, (5238) [2022-01-10 06:15:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18292 states to 18292 states and 30269 transitions. [2022-01-10 06:15:41,968 INFO L78 Accepts]: Start accepts. Automaton has 18292 states and 30269 transitions. Word has length 169 [2022-01-10 06:15:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:41,969 INFO L470 AbstractCegarLoop]: Abstraction has 18292 states and 30269 transitions. [2022-01-10 06:15:41,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:15:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 18292 states and 30269 transitions. [2022-01-10 06:15:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 06:15:41,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:41,981 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:41,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 06:15:42,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:42,192 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:42,193 INFO L85 PathProgramCache]: Analyzing trace with hash 851730263, now seen corresponding path program 1 times [2022-01-10 06:15:42,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:42,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322129898] [2022-01-10 06:15:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:42,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:42,194 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:42,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:15:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 06:15:42,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:42,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:42,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322129898] [2022-01-10 06:15:42,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322129898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:42,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:42,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:42,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623795879] [2022-01-10 06:15:42,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:42,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:42,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:42,639 INFO L87 Difference]: Start difference. First operand 18292 states and 30269 transitions. Second operand has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:15:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:43,377 INFO L93 Difference]: Finished difference Result 26226 states and 43240 transitions. [2022-01-10 06:15:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:15:43,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 172 [2022-01-10 06:15:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:43,445 INFO L225 Difference]: With dead ends: 26226 [2022-01-10 06:15:43,446 INFO L226 Difference]: Without dead ends: 18063 [2022-01-10 06:15:43,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:15:43,469 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 29 mSDsluCounter, 4568 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 5334 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:43,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 5334 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18063 states. [2022-01-10 06:15:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18063 to 18063. [2022-01-10 06:15:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18063 states, 13389 states have (on average 1.5717379938755696) internal successors, (21044), 14233 states have internal predecessors, (21044), 3713 states have call successors, (3713), 777 states have call predecessors, (3713), 960 states have return successors, (5138), 3571 states have call predecessors, (5138), 3708 states have call successors, (5138) [2022-01-10 06:15:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18063 states to 18063 states and 29895 transitions. [2022-01-10 06:15:44,258 INFO L78 Accepts]: Start accepts. Automaton has 18063 states and 29895 transitions. Word has length 172 [2022-01-10 06:15:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:44,258 INFO L470 AbstractCegarLoop]: Abstraction has 18063 states and 29895 transitions. [2022-01-10 06:15:44,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:15:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18063 states and 29895 transitions. [2022-01-10 06:15:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 06:15:44,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:44,268 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 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] [2022-01-10 06:15:44,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:44,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:44,479 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:44,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1176045586, now seen corresponding path program 1 times [2022-01-10 06:15:44,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:44,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471832583] [2022-01-10 06:15:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:44,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:44,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:44,492 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:44,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:15:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:44,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 06:15:45,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:45,054 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:45,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471832583] [2022-01-10 06:15:45,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471832583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:45,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:45,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:45,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391195133] [2022-01-10 06:15:45,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:45,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:45,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:45,056 INFO L87 Difference]: Start difference. First operand 18063 states and 29895 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:15:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:46,081 INFO L93 Difference]: Finished difference Result 40668 states and 68319 transitions. [2022-01-10 06:15:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 195 [2022-01-10 06:15:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:46,214 INFO L225 Difference]: With dead ends: 40668 [2022-01-10 06:15:46,214 INFO L226 Difference]: Without dead ends: 24331 [2022-01-10 06:15:46,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 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 06:15:46,281 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 215 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2549 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:46,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2549 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24331 states. [2022-01-10 06:15:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24331 to 18119. [2022-01-10 06:15:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18119 states, 13445 states have (on average 1.569356638155448) internal successors, (21100), 14289 states have internal predecessors, (21100), 3713 states have call successors, (3713), 777 states have call predecessors, (3713), 960 states have return successors, (5138), 3571 states have call predecessors, (5138), 3708 states have call successors, (5138) [2022-01-10 06:15:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18119 states to 18119 states and 29951 transitions. [2022-01-10 06:15:47,203 INFO L78 Accepts]: Start accepts. Automaton has 18119 states and 29951 transitions. Word has length 195 [2022-01-10 06:15:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:47,204 INFO L470 AbstractCegarLoop]: Abstraction has 18119 states and 29951 transitions. [2022-01-10 06:15:47,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:15:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18119 states and 29951 transitions. [2022-01-10 06:15:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-10 06:15:47,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:47,212 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 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] [2022-01-10 06:15:47,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:47,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:47,424 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash 111488040, now seen corresponding path program 1 times [2022-01-10 06:15:47,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:47,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882973639] [2022-01-10 06:15:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:47,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:47,426 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:47,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:15:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:47,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:15:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 06:15:48,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:15:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-10 06:15:48,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:48,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882973639] [2022-01-10 06:15:48,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882973639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:15:48,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:15:48,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2022-01-10 06:15:48,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164081489] [2022-01-10 06:15:48,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:15:48,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:15:48,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:15:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:15:48,765 INFO L87 Difference]: Start difference. First operand 18119 states and 29951 transitions. Second operand has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 10 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34)