/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:16:32,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:16:32,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:16:32,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:16:32,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:16:32,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:16:32,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:16:32,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:16:32,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:16:32,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:16:32,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:16:32,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:16:32,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:16:32,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:16:32,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:16:32,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:16:32,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:16:32,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:16:32,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:16:32,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:16:32,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:16:32,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:16:32,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:16:32,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:16:32,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:16:32,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:16:32,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:16:32,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:16:32,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:16:32,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:16:32,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:16:32,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:16:32,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:16:32,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:16:32,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:16:32,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:16:32,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:16:32,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:16:32,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:16:32,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:16:32,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:16:32,217 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 06:16:32,265 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:16:32,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:16:32,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:16:32,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:16:32,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:16:32,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:16:32,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:16:32,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:16:32,267 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:16:32,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:16:32,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:16:32,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:16:32,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:16:32,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:16:32,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:16:32,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:16:32,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:16:32,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:16:32,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:16:32,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:16:32,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:16:32,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:16:32,485 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:16:32,493 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:16:32,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2022-01-10 06:16:32,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83c36160/83f9375c594d4351a17a9a4a68b9fc7f/FLAGf64bde522 [2022-01-10 06:16:32,968 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:16:32,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2022-01-10 06:16:32,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83c36160/83f9375c594d4351a17a9a4a68b9fc7f/FLAGf64bde522 [2022-01-10 06:16:33,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83c36160/83f9375c594d4351a17a9a4a68b9fc7f [2022-01-10 06:16:33,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:16:33,316 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:16:33,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:16:33,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:16:33,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:16:33,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:33,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10aec620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33, skipping insertion in model container [2022-01-10 06:16:33,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:33,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:16:33,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:16:33,681 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2022-01-10 06:16:33,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:16:33,725 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:16:33,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:16:33,767 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2022-01-10 06:16:33,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:16:33,808 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:16:33,869 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2022-01-10 06:16:33,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:16:33,915 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:16:33,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33 WrapperNode [2022-01-10 06:16:33,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:16:33,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:16:33,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:16:33,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:16:33,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:33,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,006 INFO L137 Inliner]: procedures = 88, calls = 334, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 702 [2022-01-10 06:16:34,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:16:34,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:16:34,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:16:34,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:16:34,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:16:34,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:16:34,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:16:34,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:16:34,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (1/1) ... [2022-01-10 06:16:34,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:16:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:16:34,157 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 06:16:34,175 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 06:16:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:16:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-01-10 06:16:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-01-10 06:16:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:16:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:16:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:16:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:16:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-01-10 06:16:34,186 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-01-10 06:16:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:16:34,186 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:16:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:16:34,186 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:16:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:16:34,186 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:16:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:16:34,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:16:34,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:16:34,187 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:16:34,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-01-10 06:16:34,187 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:16:34,187 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-01-10 06:16:34,187 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:16:34,187 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:16:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:16:34,188 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:16:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:16:34,188 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:16:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:16:34,188 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:16:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-01-10 06:16:34,188 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-01-10 06:16:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:16:34,188 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:16:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:16:34,188 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:16:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:16:34,189 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:16:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:16:34,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:16:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:16:34,189 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:16:34,329 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:16:34,330 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:16:35,050 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:16:35,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:16:35,064 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:16:35,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:16:35 BoogieIcfgContainer [2022-01-10 06:16:35,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:16:35,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:16:35,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:16:35,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:16:35,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:16:33" (1/3) ... [2022-01-10 06:16:35,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea344e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:16:35, skipping insertion in model container [2022-01-10 06:16:35,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:16:33" (2/3) ... [2022-01-10 06:16:35,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea344e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:16:35, skipping insertion in model container [2022-01-10 06:16:35,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:16:35" (3/3) ... [2022-01-10 06:16:35,074 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2022-01-10 06:16:35,078 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:16:35,078 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:16:35,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:16:35,123 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 06:16:35,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:16:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 546 states, 423 states have (on average 1.6926713947990544) internal successors, (716), 441 states have internal predecessors, (716), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-01-10 06:16:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 06:16:35,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:35,165 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] [2022-01-10 06:16:35,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:35,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1392442594, now seen corresponding path program 1 times [2022-01-10 06:16:35,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:35,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89296627] [2022-01-10 06:16:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:35,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:35,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:35,181 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 06:16:35,182 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 06:16:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:35,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:16:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:35,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:35,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89296627] [2022-01-10 06:16:35,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89296627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:35,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:35,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:16:35,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386154295] [2022-01-10 06:16:35,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:35,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:16:35,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:16:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:16:35,722 INFO L87 Difference]: Start difference. First operand has 546 states, 423 states have (on average 1.6926713947990544) internal successors, (716), 441 states have internal predecessors, (716), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:35,908 INFO L93 Difference]: Finished difference Result 1089 states and 1836 transitions. [2022-01-10 06:16:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:35,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 85 [2022-01-10 06:16:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:35,929 INFO L225 Difference]: With dead ends: 1089 [2022-01-10 06:16:35,929 INFO L226 Difference]: Without dead ends: 551 [2022-01-10 06:16:35,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 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 06:16:35,940 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 117 mSDsluCounter, 4374 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5268 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:35,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5268 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-10 06:16:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 549. [2022-01-10 06:16:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 426 states have (on average 1.6830985915492958) internal successors, (717), 444 states have internal predecessors, (717), 99 states have call successors, (99), 23 states have call predecessors, (99), 23 states have return successors, (98), 94 states have call predecessors, (98), 96 states have call successors, (98) [2022-01-10 06:16:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 914 transitions. [2022-01-10 06:16:36,012 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 914 transitions. Word has length 85 [2022-01-10 06:16:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:36,013 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 914 transitions. [2022-01-10 06:16:36,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 914 transitions. [2022-01-10 06:16:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 06:16:36,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:36,022 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] [2022-01-10 06:16:36,041 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 06:16:36,231 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 06:16:36,232 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1014456678, now seen corresponding path program 1 times [2022-01-10 06:16:36,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:36,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399643524] [2022-01-10 06:16:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:36,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:36,239 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 06:16:36,240 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 06:16:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:16:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:36,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:36,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399643524] [2022-01-10 06:16:36,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399643524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:36,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:36,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:16:36,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184518707] [2022-01-10 06:16:36,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:36,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:16:36,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:36,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:16:36,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:16:36,668 INFO L87 Difference]: Start difference. First operand 549 states and 914 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:36,836 INFO L93 Difference]: Finished difference Result 1093 states and 1831 transitions. [2022-01-10 06:16:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 86 [2022-01-10 06:16:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:36,843 INFO L225 Difference]: With dead ends: 1093 [2022-01-10 06:16:36,843 INFO L226 Difference]: Without dead ends: 560 [2022-01-10 06:16:36,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 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 06:16:36,846 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 103 mSDsluCounter, 4355 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 5250 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:36,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 5250 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-10 06:16:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 549. [2022-01-10 06:16:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 426 states have (on average 1.6830985915492958) internal successors, (717), 444 states have internal predecessors, (717), 99 states have call successors, (99), 23 states have call predecessors, (99), 23 states have return successors, (98), 94 states have call predecessors, (98), 96 states have call successors, (98) [2022-01-10 06:16:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 914 transitions. [2022-01-10 06:16:36,882 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 914 transitions. Word has length 86 [2022-01-10 06:16:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:36,883 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 914 transitions. [2022-01-10 06:16:36,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 914 transitions. [2022-01-10 06:16:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 06:16:36,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:36,886 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] [2022-01-10 06:16:36,897 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 06:16:37,100 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 06:16:37,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash -966487335, now seen corresponding path program 1 times [2022-01-10 06:16:37,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:37,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298806614] [2022-01-10 06:16:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:37,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:37,103 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 06:16:37,105 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 06:16:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:16:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:37,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:37,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298806614] [2022-01-10 06:16:37,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298806614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:37,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:37,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:16:37,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052079091] [2022-01-10 06:16:37,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:37,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:16:37,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:37,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:16:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:16:37,470 INFO L87 Difference]: Start difference. First operand 549 states and 914 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:16:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:37,510 INFO L93 Difference]: Finished difference Result 1080 states and 1809 transitions. [2022-01-10 06:16:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:16:37,510 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2022-01-10 06:16:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:37,512 INFO L225 Difference]: With dead ends: 1080 [2022-01-10 06:16:37,512 INFO L226 Difference]: Without dead ends: 519 [2022-01-10 06:16:37,514 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 06:16:37,515 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 22 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2642 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 06:16:37,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2642 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:16:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-10 06:16:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-01-10 06:16:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 399 states have (on average 1.6666666666666667) internal successors, (665), 415 states have internal predecessors, (665), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:16:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 858 transitions. [2022-01-10 06:16:37,531 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 858 transitions. Word has length 86 [2022-01-10 06:16:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:37,532 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 858 transitions. [2022-01-10 06:16:37,532 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:16:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 858 transitions. [2022-01-10 06:16:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:16:37,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:37,534 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] [2022-01-10 06:16:37,553 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 06:16:37,745 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 06:16:37,746 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:37,747 INFO L85 PathProgramCache]: Analyzing trace with hash -610510714, now seen corresponding path program 1 times [2022-01-10 06:16:37,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:37,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414100336] [2022-01-10 06:16:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:37,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:37,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:37,748 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 06:16:37,774 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 06:16:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:16:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:38,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:38,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:38,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414100336] [2022-01-10 06:16:38,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414100336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:38,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:38,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:16:38,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769805356] [2022-01-10 06:16:38,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:38,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:16:38,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:16:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:16:38,185 INFO L87 Difference]: Start difference. First operand 519 states and 858 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:38,267 INFO L93 Difference]: Finished difference Result 1031 states and 1715 transitions. [2022-01-10 06:16:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-01-10 06:16:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:38,271 INFO L225 Difference]: With dead ends: 1031 [2022-01-10 06:16:38,271 INFO L226 Difference]: Without dead ends: 513 [2022-01-10 06:16:38,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 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 06:16:38,274 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 89 mSDsluCounter, 4166 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5013 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:38,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5013 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:16:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-10 06:16:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2022-01-10 06:16:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 393 states have (on average 1.659033078880407) internal successors, (652), 409 states have internal predecessors, (652), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:16:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 845 transitions. [2022-01-10 06:16:38,303 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 845 transitions. Word has length 87 [2022-01-10 06:16:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:38,304 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 845 transitions. [2022-01-10 06:16:38,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 845 transitions. [2022-01-10 06:16:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:16:38,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:38,305 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] [2022-01-10 06:16:38,339 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 06:16:38,506 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 06:16:38,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1878847093, now seen corresponding path program 1 times [2022-01-10 06:16:38,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:38,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626279792] [2022-01-10 06:16:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:38,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:38,514 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 06:16:38,515 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 06:16:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:16:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:38,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:38,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626279792] [2022-01-10 06:16:38,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626279792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:38,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:38,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:16:38,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194997672] [2022-01-10 06:16:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:38,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:16:38,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:16:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:16:38,914 INFO L87 Difference]: Start difference. First operand 513 states and 845 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:38,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:38,981 INFO L93 Difference]: Finished difference Result 1019 states and 1689 transitions. [2022-01-10 06:16:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:38,982 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2022-01-10 06:16:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:38,984 INFO L225 Difference]: With dead ends: 1019 [2022-01-10 06:16:38,984 INFO L226 Difference]: Without dead ends: 507 [2022-01-10 06:16:38,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:38,986 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 75 mSDsluCounter, 4118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 4953 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:38,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 4953 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:16:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-10 06:16:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-01-10 06:16:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.648578811369509) internal successors, (638), 403 states have internal predecessors, (638), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:16:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 831 transitions. [2022-01-10 06:16:38,999 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 831 transitions. Word has length 88 [2022-01-10 06:16:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:39,000 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 831 transitions. [2022-01-10 06:16:39,000 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 831 transitions. [2022-01-10 06:16:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:16:39,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:39,002 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] [2022-01-10 06:16:39,026 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 06:16:39,213 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 06:16:39,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:39,214 INFO L85 PathProgramCache]: Analyzing trace with hash 377758762, now seen corresponding path program 1 times [2022-01-10 06:16:39,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:39,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241150423] [2022-01-10 06:16:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:39,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:39,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:39,216 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 06:16:39,217 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 06:16:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:16:39,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:39,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:39,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:39,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241150423] [2022-01-10 06:16:39,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241150423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:39,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:39,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:16:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835156587] [2022-01-10 06:16:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:39,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:16:39,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:16:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:39,627 INFO L87 Difference]: Start difference. First operand 507 states and 831 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:39,722 INFO L93 Difference]: Finished difference Result 1001 states and 1650 transitions. [2022-01-10 06:16:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:16:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2022-01-10 06:16:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:39,725 INFO L225 Difference]: With dead ends: 1001 [2022-01-10 06:16:39,725 INFO L226 Difference]: Without dead ends: 507 [2022-01-10 06:16:39,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 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 06:16:39,728 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 41 mSDsluCounter, 4851 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 5664 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:39,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 5664 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-10 06:16:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-01-10 06:16:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6459948320413436) internal successors, (637), 403 states have internal predecessors, (637), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:16:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 830 transitions. [2022-01-10 06:16:39,739 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 830 transitions. Word has length 89 [2022-01-10 06:16:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:39,739 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 830 transitions. [2022-01-10 06:16:39,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 830 transitions. [2022-01-10 06:16:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-10 06:16:39,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:39,741 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] [2022-01-10 06:16:39,755 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 06:16:39,955 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 06:16:39,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1176382102, now seen corresponding path program 1 times [2022-01-10 06:16:39,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:39,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197499894] [2022-01-10 06:16:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:39,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:39,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:39,958 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 06:16:39,959 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 06:16:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:16:40,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:40,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:40,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197499894] [2022-01-10 06:16:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197499894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:40,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:40,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:16:40,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324076551] [2022-01-10 06:16:40,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:40,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:16:40,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:16:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:40,366 INFO L87 Difference]: Start difference. First operand 507 states and 830 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:40,465 INFO L93 Difference]: Finished difference Result 1001 states and 1648 transitions. [2022-01-10 06:16:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:16:40,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2022-01-10 06:16:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:40,470 INFO L225 Difference]: With dead ends: 1001 [2022-01-10 06:16:40,470 INFO L226 Difference]: Without dead ends: 507 [2022-01-10 06:16:40,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 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 06:16:40,473 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 38 mSDsluCounter, 4851 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 5664 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:40,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 5664 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-10 06:16:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-01-10 06:16:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6434108527131783) internal successors, (636), 403 states have internal predecessors, (636), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:16:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 829 transitions. [2022-01-10 06:16:40,494 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 829 transitions. Word has length 90 [2022-01-10 06:16:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:40,494 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 829 transitions. [2022-01-10 06:16:40,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 829 transitions. [2022-01-10 06:16:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 06:16:40,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:40,496 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] [2022-01-10 06:16:40,511 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 06:16:40,708 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 06:16:40,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1042184495, now seen corresponding path program 1 times [2022-01-10 06:16:40,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:40,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924628373] [2022-01-10 06:16:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:40,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:40,724 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 06:16:40,728 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 06:16:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:40,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:16:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:41,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:41,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924628373] [2022-01-10 06:16:41,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924628373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:41,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:41,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:16:41,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408396649] [2022-01-10 06:16:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:41,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:16:41,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:16:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:41,164 INFO L87 Difference]: Start difference. First operand 507 states and 829 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:41,264 INFO L93 Difference]: Finished difference Result 1001 states and 1646 transitions. [2022-01-10 06:16:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:16:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 91 [2022-01-10 06:16:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:41,267 INFO L225 Difference]: With dead ends: 1001 [2022-01-10 06:16:41,267 INFO L226 Difference]: Without dead ends: 507 [2022-01-10 06:16:41,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:16:41,270 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 35 mSDsluCounter, 4851 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 5664 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:41,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 5664 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-10 06:16:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-01-10 06:16:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6408268733850129) internal successors, (635), 403 states have internal predecessors, (635), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:16:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 828 transitions. [2022-01-10 06:16:41,281 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 828 transitions. Word has length 91 [2022-01-10 06:16:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:41,281 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 828 transitions. [2022-01-10 06:16:41,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 828 transitions. [2022-01-10 06:16:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:16:41,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:41,283 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] [2022-01-10 06:16:41,297 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 06:16:41,495 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 06:16:41,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash -44401905, now seen corresponding path program 1 times [2022-01-10 06:16:41,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:41,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550602643] [2022-01-10 06:16:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:41,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:41,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:41,498 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 06:16:41,506 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 06:16:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:16:41,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:16:41,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:41,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:41,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550602643] [2022-01-10 06:16:41,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550602643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:41,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:41,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:16:41,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853968290] [2022-01-10 06:16:41,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:41,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:16:41,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:16:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:41,939 INFO L87 Difference]: Start difference. First operand 507 states and 828 transitions. Second operand has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:42,029 INFO L93 Difference]: Finished difference Result 1001 states and 1644 transitions. [2022-01-10 06:16:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:16:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-01-10 06:16:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:42,032 INFO L225 Difference]: With dead ends: 1001 [2022-01-10 06:16:42,032 INFO L226 Difference]: Without dead ends: 507 [2022-01-10 06:16:42,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 85 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 06:16:42,035 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 32 mSDsluCounter, 4851 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 5664 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:42,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 5664 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-10 06:16:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-01-10 06:16:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6382428940568476) internal successors, (634), 403 states have internal predecessors, (634), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:16:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 827 transitions. [2022-01-10 06:16:42,049 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 827 transitions. Word has length 92 [2022-01-10 06:16:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:42,049 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 827 transitions. [2022-01-10 06:16:42,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 827 transitions. [2022-01-10 06:16:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 06:16:42,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:42,051 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] [2022-01-10 06:16:42,066 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 06:16:42,264 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 06:16:42,264 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:42,265 INFO L85 PathProgramCache]: Analyzing trace with hash -511516108, now seen corresponding path program 1 times [2022-01-10 06:16:42,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:42,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136977259] [2022-01-10 06:16:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:42,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:42,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:42,267 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 06:16:42,269 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 06:16:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:42,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:16:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:16:42,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:42,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:42,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136977259] [2022-01-10 06:16:42,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136977259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:42,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:42,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:16:42,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726891940] [2022-01-10 06:16:42,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:42,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:16:42,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:16:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:16:42,679 INFO L87 Difference]: Start difference. First operand 507 states and 827 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:43,300 INFO L93 Difference]: Finished difference Result 1488 states and 2465 transitions. [2022-01-10 06:16:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:43,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 93 [2022-01-10 06:16:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:43,306 INFO L225 Difference]: With dead ends: 1488 [2022-01-10 06:16:43,306 INFO L226 Difference]: Without dead ends: 999 [2022-01-10 06:16:43,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:43,310 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 813 mSDsluCounter, 3341 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:43,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 4234 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:16:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-01-10 06:16:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 990. [2022-01-10 06:16:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 759 states have (on average 1.6416337285902503) internal successors, (1246), 790 states have internal predecessors, (1246), 188 states have call successors, (188), 42 states have call predecessors, (188), 42 states have return successors, (199), 183 states have call predecessors, (199), 184 states have call successors, (199) [2022-01-10 06:16:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1633 transitions. [2022-01-10 06:16:43,363 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1633 transitions. Word has length 93 [2022-01-10 06:16:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:43,363 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1633 transitions. [2022-01-10 06:16:43,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:16:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1633 transitions. [2022-01-10 06:16:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 06:16:43,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:43,365 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] [2022-01-10 06:16:43,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 06:16:43,571 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 06:16:43,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1915141428, now seen corresponding path program 1 times [2022-01-10 06:16:43,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888567438] [2022-01-10 06:16:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:43,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:43,574 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 06:16:43,575 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 06:16:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:16:43,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:16:43,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:43,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:43,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888567438] [2022-01-10 06:16:43,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888567438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:43,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:43,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:16:43,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924455959] [2022-01-10 06:16:43,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:16:43,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:16:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:16:43,979 INFO L87 Difference]: Start difference. First operand 990 states and 1633 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 06:16:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:44,392 INFO L93 Difference]: Finished difference Result 2420 states and 4010 transitions. [2022-01-10 06:16:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:16:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2022-01-10 06:16:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:44,399 INFO L225 Difference]: With dead ends: 2420 [2022-01-10 06:16:44,399 INFO L226 Difference]: Without dead ends: 1448 [2022-01-10 06:16:44,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 89 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 06:16:44,404 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 814 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:44,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 3406 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:16:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2022-01-10 06:16:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1438. [2022-01-10 06:16:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1102 states have (on average 1.6143375680580763) internal successors, (1779), 1147 states have internal predecessors, (1779), 272 states have call successors, (272), 63 states have call predecessors, (272), 63 states have return successors, (294), 265 states have call predecessors, (294), 267 states have call successors, (294) [2022-01-10 06:16:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2345 transitions. [2022-01-10 06:16:44,443 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2345 transitions. Word has length 93 [2022-01-10 06:16:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:44,444 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 2345 transitions. [2022-01-10 06:16:44,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 06:16:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2345 transitions. [2022-01-10 06:16:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 06:16:44,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:44,447 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] [2022-01-10 06:16:44,463 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 06:16:44,661 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 06:16:44,661 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash -775152523, now seen corresponding path program 1 times [2022-01-10 06:16:44,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057143968] [2022-01-10 06:16:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:44,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:44,663 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 06:16:44,665 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 06:16:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:16:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:16:45,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:45,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:45,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057143968] [2022-01-10 06:16:45,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057143968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:45,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:45,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:16:45,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908998770] [2022-01-10 06:16:45,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:45,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:16:45,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:16:45,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:16:45,058 INFO L87 Difference]: Start difference. First operand 1438 states and 2345 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:16:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:45,878 INFO L93 Difference]: Finished difference Result 5136 states and 8704 transitions. [2022-01-10 06:16:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 101 [2022-01-10 06:16:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:45,898 INFO L225 Difference]: With dead ends: 5136 [2022-01-10 06:16:45,898 INFO L226 Difference]: Without dead ends: 3716 [2022-01-10 06:16:45,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:45,906 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 1093 mSDsluCounter, 4065 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 5315 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:45,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1162 Valid, 5315 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:16:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2022-01-10 06:16:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 2816. [2022-01-10 06:16:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2164 states have (on average 1.61090573012939) internal successors, (3486), 2252 states have internal predecessors, (3486), 524 states have call successors, (524), 123 states have call predecessors, (524), 127 states have return successors, (649), 516 states have call predecessors, (649), 516 states have call successors, (649) [2022-01-10 06:16:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4659 transitions. [2022-01-10 06:16:46,004 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4659 transitions. Word has length 101 [2022-01-10 06:16:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4659 transitions. [2022-01-10 06:16:46,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:16:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4659 transitions. [2022-01-10 06:16:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 06:16:46,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:46,022 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] [2022-01-10 06:16:46,048 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 06:16:46,233 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 06:16:46,234 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:46,234 INFO L85 PathProgramCache]: Analyzing trace with hash -330901337, now seen corresponding path program 1 times [2022-01-10 06:16:46,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:46,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239650530] [2022-01-10 06:16:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:46,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:46,236 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 06:16:46,237 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 06:16:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:46,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:16:46,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:16:46,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:46,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:46,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239650530] [2022-01-10 06:16:46,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239650530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:46,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:46,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:16:46,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566881284] [2022-01-10 06:16:46,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:46,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:16:46,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:16:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:16:46,807 INFO L87 Difference]: Start difference. First operand 2816 states and 4659 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:16:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:47,004 INFO L93 Difference]: Finished difference Result 5632 states and 9446 transitions. [2022-01-10 06:16:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:16:47,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 102 [2022-01-10 06:16:47,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:47,023 INFO L225 Difference]: With dead ends: 5632 [2022-01-10 06:16:47,024 INFO L226 Difference]: Without dead ends: 2834 [2022-01-10 06:16:47,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 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 06:16:47,056 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 19 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:47,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2394 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-01-10 06:16:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2828. [2022-01-10 06:16:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2173 states have (on average 1.606994937873907) internal successors, (3492), 2261 states have internal predecessors, (3492), 524 states have call successors, (524), 129 states have call predecessors, (524), 130 states have return successors, (633), 513 states have call predecessors, (633), 516 states have call successors, (633) [2022-01-10 06:16:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 4649 transitions. [2022-01-10 06:16:47,209 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 4649 transitions. Word has length 102 [2022-01-10 06:16:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:47,209 INFO L470 AbstractCegarLoop]: Abstraction has 2828 states and 4649 transitions. [2022-01-10 06:16:47,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:16:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 4649 transitions. [2022-01-10 06:16:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:16:47,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:47,210 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] [2022-01-10 06:16:47,224 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 06:16:47,422 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 06:16:47,422 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash -223809895, now seen corresponding path program 1 times [2022-01-10 06:16:47,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:47,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873674994] [2022-01-10 06:16:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:47,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:47,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:47,440 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 06:16:47,441 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 06:16:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:16:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:16:47,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:47,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:47,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873674994] [2022-01-10 06:16:47,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873674994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:47,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:47,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:16:47,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020460481] [2022-01-10 06:16:47,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:47,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:16:47,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:16:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:16:47,904 INFO L87 Difference]: Start difference. First operand 2828 states and 4649 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:16:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:48,889 INFO L93 Difference]: Finished difference Result 10190 states and 17662 transitions. [2022-01-10 06:16:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 110 [2022-01-10 06:16:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:48,928 INFO L225 Difference]: With dead ends: 10190 [2022-01-10 06:16:48,928 INFO L226 Difference]: Without dead ends: 7380 [2022-01-10 06:16:48,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:48,945 INFO L933 BasicCegarLoop]: 1209 mSDtfsCounter, 1070 mSDsluCounter, 3990 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 5199 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:48,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 5199 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:16:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7380 states. [2022-01-10 06:16:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7380 to 5620. [2022-01-10 06:16:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5620 states, 4324 states have (on average 1.602913968547641) internal successors, (6931), 4498 states have internal predecessors, (6931), 1031 states have call successors, (1031), 255 states have call predecessors, (1031), 264 states have return successors, (1458), 1018 states have call predecessors, (1458), 1017 states have call successors, (1458) [2022-01-10 06:16:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5620 states to 5620 states and 9420 transitions. [2022-01-10 06:16:49,206 INFO L78 Accepts]: Start accepts. Automaton has 5620 states and 9420 transitions. Word has length 110 [2022-01-10 06:16:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:49,208 INFO L470 AbstractCegarLoop]: Abstraction has 5620 states and 9420 transitions. [2022-01-10 06:16:49,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:16:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5620 states and 9420 transitions. [2022-01-10 06:16:49,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:16:49,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:49,210 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] [2022-01-10 06:16:49,223 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 06:16:49,421 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 06:16:49,422 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash -602606661, now seen corresponding path program 1 times [2022-01-10 06:16:49,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:49,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417824482] [2022-01-10 06:16:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:49,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:49,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:49,424 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 06:16:49,425 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 06:16:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:49,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:16:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:16:49,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:49,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417824482] [2022-01-10 06:16:49,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417824482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:49,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:49,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:16:49,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496804145] [2022-01-10 06:16:49,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:49,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:16:49,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:16:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:16:49,833 INFO L87 Difference]: Start difference. First operand 5620 states and 9420 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:16:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:50,034 INFO L93 Difference]: Finished difference Result 11294 states and 19263 transitions. [2022-01-10 06:16:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:16:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 111 [2022-01-10 06:16:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:50,059 INFO L225 Difference]: With dead ends: 11294 [2022-01-10 06:16:50,060 INFO L226 Difference]: Without dead ends: 5692 [2022-01-10 06:16:50,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 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 06:16:50,087 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 21 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:50,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2392 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:16:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5692 states. [2022-01-10 06:16:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5692 to 5680. [2022-01-10 06:16:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 4378 states have (on average 1.596847875742348) internal successors, (6991), 4540 states have internal predecessors, (6991), 1031 states have call successors, (1031), 279 states have call predecessors, (1031), 270 states have return successors, (1434), 1012 states have call predecessors, (1434), 1017 states have call successors, (1434) [2022-01-10 06:16:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 9456 transitions. [2022-01-10 06:16:50,323 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 9456 transitions. Word has length 111 [2022-01-10 06:16:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:50,324 INFO L470 AbstractCegarLoop]: Abstraction has 5680 states and 9456 transitions. [2022-01-10 06:16:50,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:16:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 9456 transitions. [2022-01-10 06:16:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 06:16:50,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:50,325 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] [2022-01-10 06:16:50,348 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 06:16:50,537 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 06:16:50,537 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 815865513, now seen corresponding path program 1 times [2022-01-10 06:16:50,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:50,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892790831] [2022-01-10 06:16:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:50,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:50,539 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 06:16:50,541 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 06:16:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:50,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:16:50,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:16:50,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:50,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892790831] [2022-01-10 06:16:50,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892790831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:50,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:50,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:16:50,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054632206] [2022-01-10 06:16:50,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:50,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:16:50,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:16:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:16:50,964 INFO L87 Difference]: Start difference. First operand 5680 states and 9456 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:16:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:52,255 INFO L93 Difference]: Finished difference Result 20470 states and 36718 transitions. [2022-01-10 06:16:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:52,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 120 [2022-01-10 06:16:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:52,338 INFO L225 Difference]: With dead ends: 20470 [2022-01-10 06:16:52,339 INFO L226 Difference]: Without dead ends: 14808 [2022-01-10 06:16:52,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:52,378 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 1048 mSDsluCounter, 4059 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 5298 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:52,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 5298 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:16:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14808 states. [2022-01-10 06:16:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14808 to 11360. [2022-01-10 06:16:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11360 states, 8761 states have (on average 1.5925122702887797) internal successors, (13952), 9083 states have internal predecessors, (13952), 2048 states have call successors, (2048), 555 states have call predecessors, (2048), 550 states have return successors, (3433), 2025 states have call predecessors, (3433), 2022 states have call successors, (3433) [2022-01-10 06:16:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11360 states to 11360 states and 19433 transitions. [2022-01-10 06:16:52,907 INFO L78 Accepts]: Start accepts. Automaton has 11360 states and 19433 transitions. Word has length 120 [2022-01-10 06:16:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:52,907 INFO L470 AbstractCegarLoop]: Abstraction has 11360 states and 19433 transitions. [2022-01-10 06:16:52,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:16:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 11360 states and 19433 transitions. [2022-01-10 06:16:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-10 06:16:52,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:52,909 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] [2022-01-10 06:16:52,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:16:53,120 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 06:16:53,120 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:53,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1379102307, now seen corresponding path program 1 times [2022-01-10 06:16:53,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:53,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179948428] [2022-01-10 06:16:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:53,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:53,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:53,122 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 06:16:53,125 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 06:16:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:16:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:16:53,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:53,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179948428] [2022-01-10 06:16:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179948428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:53,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:53,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:16:53,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59262202] [2022-01-10 06:16:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:53,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:16:53,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:16:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:16:53,546 INFO L87 Difference]: Start difference. First operand 11360 states and 19433 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:16:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:53,990 INFO L93 Difference]: Finished difference Result 22846 states and 40093 transitions. [2022-01-10 06:16:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:16:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 121 [2022-01-10 06:16:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:54,088 INFO L225 Difference]: With dead ends: 22846 [2022-01-10 06:16:54,088 INFO L226 Difference]: Without dead ends: 11504 [2022-01-10 06:16:54,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 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 06:16:54,152 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 21 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:54,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2392 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:16:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11504 states. [2022-01-10 06:16:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11504 to 11480. [2022-01-10 06:16:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11480 states, 8869 states have (on average 1.5866501296651256) internal successors, (14072), 9191 states have internal predecessors, (14072), 2048 states have call successors, (2048), 579 states have call predecessors, (2048), 562 states have return successors, (3401), 2013 states have call predecessors, (3401), 2022 states have call successors, (3401) [2022-01-10 06:16:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11480 states to 11480 states and 19521 transitions. [2022-01-10 06:16:54,573 INFO L78 Accepts]: Start accepts. Automaton has 11480 states and 19521 transitions. Word has length 121 [2022-01-10 06:16:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:54,573 INFO L470 AbstractCegarLoop]: Abstraction has 11480 states and 19521 transitions. [2022-01-10 06:16:54,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:16:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 11480 states and 19521 transitions. [2022-01-10 06:16:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:16:54,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:54,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:54,586 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 06:16:54,786 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 06:16:54,786 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:54,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1933314565, now seen corresponding path program 1 times [2022-01-10 06:16:54,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:54,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689514680] [2022-01-10 06:16:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:54,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:54,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:54,788 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 06:16:54,789 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 06:16:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:16:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:16:55,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:55,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689514680] [2022-01-10 06:16:55,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689514680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:55,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:55,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:16:55,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480907872] [2022-01-10 06:16:55,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:55,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:16:55,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:16:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:16:55,246 INFO L87 Difference]: Start difference. First operand 11480 states and 19521 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:16:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:57,117 INFO L93 Difference]: Finished difference Result 41242 states and 77992 transitions. [2022-01-10 06:16:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:57,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 131 [2022-01-10 06:16:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:57,278 INFO L225 Difference]: With dead ends: 41242 [2022-01-10 06:16:57,278 INFO L226 Difference]: Without dead ends: 29780 [2022-01-10 06:16:57,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:57,373 INFO L933 BasicCegarLoop]: 1080 mSDtfsCounter, 1106 mSDsluCounter, 3666 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 4746 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:57,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 4746 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:16:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29780 states. [2022-01-10 06:16:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29780 to 23020. [2022-01-10 06:16:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23020 states, 17788 states have (on average 1.5822464582864852) internal successors, (28145), 18430 states have internal predecessors, (28145), 4085 states have call successors, (4085), 1155 states have call predecessors, (4085), 1146 states have return successors, (8480), 4042 states have call predecessors, (8480), 4035 states have call successors, (8480) [2022-01-10 06:16:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23020 states to 23020 states and 40710 transitions. [2022-01-10 06:16:58,668 INFO L78 Accepts]: Start accepts. Automaton has 23020 states and 40710 transitions. Word has length 131 [2022-01-10 06:16:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:58,668 INFO L470 AbstractCegarLoop]: Abstraction has 23020 states and 40710 transitions. [2022-01-10 06:16:58,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:16:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 23020 states and 40710 transitions. [2022-01-10 06:16:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 06:16:58,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:58,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:58,703 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 06:16:58,882 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 06:16:58,883 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:58,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1148509977, now seen corresponding path program 1 times [2022-01-10 06:16:58,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:58,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265641772] [2022-01-10 06:16:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:58,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:58,885 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 06:16:58,946 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 06:16:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:16:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:16:59,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:59,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265641772] [2022-01-10 06:16:59,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265641772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:59,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:59,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:16:59,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308825884] [2022-01-10 06:16:59,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:59,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:16:59,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:16:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:16:59,454 INFO L87 Difference]: Start difference. First operand 23020 states and 40710 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:01,550 INFO L93 Difference]: Finished difference Result 46154 states and 83241 transitions. [2022-01-10 06:17:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:17:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 132 [2022-01-10 06:17:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:01,814 INFO L225 Difference]: With dead ends: 46154 [2022-01-10 06:17:01,814 INFO L226 Difference]: Without dead ends: 23152 [2022-01-10 06:17:02,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:02,100 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 593 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:02,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 3146 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:17:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23152 states. [2022-01-10 06:17:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23152 to 23084. [2022-01-10 06:17:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23084 states, 17836 states have (on average 1.5806795245570755) internal successors, (28193), 18478 states have internal predecessors, (28193), 4085 states have call successors, (4085), 1171 states have call predecessors, (4085), 1162 states have return successors, (8480), 4042 states have call predecessors, (8480), 4035 states have call successors, (8480) [2022-01-10 06:17:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23084 states to 23084 states and 40758 transitions. [2022-01-10 06:17:03,156 INFO L78 Accepts]: Start accepts. Automaton has 23084 states and 40758 transitions. Word has length 132 [2022-01-10 06:17:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:03,157 INFO L470 AbstractCegarLoop]: Abstraction has 23084 states and 40758 transitions. [2022-01-10 06:17:03,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 23084 states and 40758 transitions. [2022-01-10 06:17:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:17:03,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:03,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:03,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:17:03,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:17:03,371 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -851403690, now seen corresponding path program 1 times [2022-01-10 06:17:03,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593994594] [2022-01-10 06:17:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:03,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:03,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:17:03,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:17:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:03,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:17:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:03,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:03,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:03,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593994594] [2022-01-10 06:17:03,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593994594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:03,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:03,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:17:03,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662052152] [2022-01-10 06:17:03,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:03,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:17:03,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:17:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:17:03,888 INFO L87 Difference]: Start difference. First operand 23084 states and 40758 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:05,731 INFO L93 Difference]: Finished difference Result 46298 states and 83337 transitions. [2022-01-10 06:17:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:17:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 133 [2022-01-10 06:17:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:05,834 INFO L225 Difference]: With dead ends: 46298 [2022-01-10 06:17:05,835 INFO L226 Difference]: Without dead ends: 23232 [2022-01-10 06:17:06,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:06,049 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 605 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:06,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 2613 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:17:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23232 states. [2022-01-10 06:17:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23232 to 23164. [2022-01-10 06:17:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23164 states, 17900 states have (on average 1.5786033519553073) internal successors, (28257), 18542 states have internal predecessors, (28257), 4085 states have call successors, (4085), 1187 states have call predecessors, (4085), 1178 states have return successors, (8480), 4042 states have call predecessors, (8480), 4035 states have call successors, (8480) [2022-01-10 06:17:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23164 states to 23164 states and 40822 transitions. [2022-01-10 06:17:07,059 INFO L78 Accepts]: Start accepts. Automaton has 23164 states and 40822 transitions. Word has length 133 [2022-01-10 06:17:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:07,060 INFO L470 AbstractCegarLoop]: Abstraction has 23164 states and 40822 transitions. [2022-01-10 06:17:07,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 23164 states and 40822 transitions. [2022-01-10 06:17:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:17:07,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:07,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:07,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:17:07,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:17:07,278 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2005205315, now seen corresponding path program 1 times [2022-01-10 06:17:07,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:07,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204312090] [2022-01-10 06:17:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:07,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:07,280 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:17:07,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:17:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:17:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:07,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:07,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:07,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204312090] [2022-01-10 06:17:07,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204312090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:07,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:07,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:17:07,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337582249] [2022-01-10 06:17:07,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:07,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:17:07,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:17:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:17:07,766 INFO L87 Difference]: Start difference. First operand 23164 states and 40822 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:09,563 INFO L93 Difference]: Finished difference Result 46474 states and 83473 transitions. [2022-01-10 06:17:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:17:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2022-01-10 06:17:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:09,675 INFO L225 Difference]: With dead ends: 46474 [2022-01-10 06:17:09,676 INFO L226 Difference]: Without dead ends: 23328 [2022-01-10 06:17:09,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:09,964 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 596 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 2880 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:09,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 2880 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:17:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23328 states. [2022-01-10 06:17:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23328 to 23260. [2022-01-10 06:17:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23260 states, 17980 states have (on average 1.5760289210233593) internal successors, (28337), 18622 states have internal predecessors, (28337), 4085 states have call successors, (4085), 1203 states have call predecessors, (4085), 1194 states have return successors, (8480), 4042 states have call predecessors, (8480), 4035 states have call successors, (8480) [2022-01-10 06:17:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23260 states to 23260 states and 40902 transitions. [2022-01-10 06:17:10,798 INFO L78 Accepts]: Start accepts. Automaton has 23260 states and 40902 transitions. Word has length 134 [2022-01-10 06:17:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:10,799 INFO L470 AbstractCegarLoop]: Abstraction has 23260 states and 40902 transitions. [2022-01-10 06:17:10,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 23260 states and 40902 transitions. [2022-01-10 06:17:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-10 06:17:10,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:10,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:10,832 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 06:17:11,015 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 06:17:11,016 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1692947342, now seen corresponding path program 1 times [2022-01-10 06:17:11,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:11,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034781649] [2022-01-10 06:17:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:11,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:11,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:11,018 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 06:17:11,019 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 06:17:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:17:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:11,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:11,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034781649] [2022-01-10 06:17:11,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034781649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:11,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:11,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:17:11,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071094128] [2022-01-10 06:17:11,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:11,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:17:11,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:11,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:17:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:17:11,614 INFO L87 Difference]: Start difference. First operand 23260 states and 40902 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:13,197 INFO L93 Difference]: Finished difference Result 46682 states and 83645 transitions. [2022-01-10 06:17:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:17:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 135 [2022-01-10 06:17:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:13,310 INFO L225 Difference]: With dead ends: 46682 [2022-01-10 06:17:13,310 INFO L226 Difference]: Without dead ends: 23440 [2022-01-10 06:17:13,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:13,460 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 605 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:13,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 2613 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:17:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23440 states. [2022-01-10 06:17:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23440 to 23372. [2022-01-10 06:17:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23372 states, 18076 states have (on average 1.5729696835583094) internal successors, (28433), 18718 states have internal predecessors, (28433), 4085 states have call successors, (4085), 1219 states have call predecessors, (4085), 1210 states have return successors, (8480), 4042 states have call predecessors, (8480), 4035 states have call successors, (8480) [2022-01-10 06:17:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23372 states to 23372 states and 40998 transitions. [2022-01-10 06:17:14,399 INFO L78 Accepts]: Start accepts. Automaton has 23372 states and 40998 transitions. Word has length 135 [2022-01-10 06:17:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:14,400 INFO L470 AbstractCegarLoop]: Abstraction has 23372 states and 40998 transitions. [2022-01-10 06:17:14,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:17:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 23372 states and 40998 transitions. [2022-01-10 06:17:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 06:17:14,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:14,401 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:17:14,413 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 06:17:14,612 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 06:17:14,613 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:14,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1864685983, now seen corresponding path program 1 times [2022-01-10 06:17:14,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:14,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390124887] [2022-01-10 06:17:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:14,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:14,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:14,615 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 06:17:14,617 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 06:17:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:17:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:15,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:15,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:15,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390124887] [2022-01-10 06:17:15,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390124887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:15,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:15,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:17:15,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844495263] [2022-01-10 06:17:15,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:15,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:17:15,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:17:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:17:15,047 INFO L87 Difference]: Start difference. First operand 23372 states and 40998 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 06:17:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:16,690 INFO L93 Difference]: Finished difference Result 45948 states and 84031 transitions. [2022-01-10 06:17:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:17:16,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 136 [2022-01-10 06:17:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:16,800 INFO L225 Difference]: With dead ends: 45948 [2022-01-10 06:17:16,800 INFO L226 Difference]: Without dead ends: 28222 [2022-01-10 06:17:16,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:17:16,895 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 163 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:16,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 2555 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:17:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28222 states. [2022-01-10 06:17:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28222 to 26324. [2022-01-10 06:17:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26324 states, 19672 states have (on average 1.5655246034973567) internal successors, (30797), 20696 states have internal predecessors, (30797), 5419 states have call successors, (5419), 1219 states have call predecessors, (5419), 1232 states have return successors, (10874), 5376 states have call predecessors, (10874), 5369 states have call successors, (10874) [2022-01-10 06:17:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26324 states to 26324 states and 47090 transitions. [2022-01-10 06:17:18,262 INFO L78 Accepts]: Start accepts. Automaton has 26324 states and 47090 transitions. Word has length 136 [2022-01-10 06:17:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:18,263 INFO L470 AbstractCegarLoop]: Abstraction has 26324 states and 47090 transitions. [2022-01-10 06:17:18,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 06:17:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 26324 states and 47090 transitions. [2022-01-10 06:17:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 06:17:18,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:18,264 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:17:18,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 06:17:18,469 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 06:17:18,469 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1170885831, now seen corresponding path program 1 times [2022-01-10 06:17:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:18,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105972135] [2022-01-10 06:17:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:18,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:18,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:18,472 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 06:17:18,473 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 06:17:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:17:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:18,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:18,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:18,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105972135] [2022-01-10 06:17:18,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105972135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:18,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:18,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:17:18,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626419474] [2022-01-10 06:17:18,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:18,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:17:18,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:18,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:17:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:18,960 INFO L87 Difference]: Start difference. First operand 26324 states and 47090 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:17:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:23,162 INFO L93 Difference]: Finished difference Result 87054 states and 167902 transitions. [2022-01-10 06:17:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:17:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 143 [2022-01-10 06:17:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:23,591 INFO L225 Difference]: With dead ends: 87054 [2022-01-10 06:17:23,592 INFO L226 Difference]: Without dead ends: 60748 [2022-01-10 06:17:23,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:23,951 INFO L933 BasicCegarLoop]: 1222 mSDtfsCounter, 928 mSDsluCounter, 3907 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 5129 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:23,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 5129 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:17:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60748 states. [2022-01-10 06:17:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60748 to 59828. [2022-01-10 06:17:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59828 states, 42884 states have (on average 1.5546590803096727) internal successors, (66670), 45794 states have internal predecessors, (66670), 14385 states have call successors, (14385), 2435 states have call predecessors, (14385), 2558 states have return successors, (32459), 14350 states have call predecessors, (32459), 14287 states have call successors, (32459) [2022-01-10 06:17:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59828 states to 59828 states and 113514 transitions. [2022-01-10 06:17:27,786 INFO L78 Accepts]: Start accepts. Automaton has 59828 states and 113514 transitions. Word has length 143 [2022-01-10 06:17:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:27,787 INFO L470 AbstractCegarLoop]: Abstraction has 59828 states and 113514 transitions. [2022-01-10 06:17:27,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:17:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 59828 states and 113514 transitions. [2022-01-10 06:17:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 06:17:27,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:27,790 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:17:27,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:17:27,995 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 06:17:27,995 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash -529854648, now seen corresponding path program 1 times [2022-01-10 06:17:27,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:27,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088965891] [2022-01-10 06:17:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:27,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:27,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:27,997 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 06:17:27,999 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 06:17:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:17:28,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:17:28,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:28,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:28,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088965891] [2022-01-10 06:17:28,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088965891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:28,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:28,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:17:28,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653522782] [2022-01-10 06:17:28,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:28,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:17:28,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:17:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:17:28,507 INFO L87 Difference]: Start difference. First operand 59828 states and 113514 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:17:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:17:33,635 INFO L93 Difference]: Finished difference Result 115528 states and 220578 transitions. [2022-01-10 06:17:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:17:33,636 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), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 143 [2022-01-10 06:17:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:17:34,195 INFO L225 Difference]: With dead ends: 115528 [2022-01-10 06:17:34,196 INFO L226 Difference]: Without dead ends: 55588 [2022-01-10 06:17:34,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:17:34,853 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 598 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:17:34,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 2879 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:17:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55588 states. [2022-01-10 06:17:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55588 to 55520. [2022-01-10 06:17:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55520 states, 39860 states have (on average 1.5685900652282991) internal successors, (62524), 42562 states have internal predecessors, (62524), 13279 states have call successors, (13279), 2209 states have call predecessors, (13279), 2380 states have return successors, (27470), 13308 states have call predecessors, (27470), 13181 states have call successors, (27470) [2022-01-10 06:17:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55520 states to 55520 states and 103273 transitions. [2022-01-10 06:17:38,366 INFO L78 Accepts]: Start accepts. Automaton has 55520 states and 103273 transitions. Word has length 143 [2022-01-10 06:17:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:17:38,366 INFO L470 AbstractCegarLoop]: Abstraction has 55520 states and 103273 transitions. [2022-01-10 06:17:38,366 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), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:17:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 55520 states and 103273 transitions. [2022-01-10 06:17:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 06:17:38,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:17:38,369 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:17:38,382 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 06:17:38,580 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 06:17:38,581 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:17:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:17:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash -970974647, now seen corresponding path program 1 times [2022-01-10 06:17:38,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:17:38,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313636987] [2022-01-10 06:17:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:17:38,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:17:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:17:38,583 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 06:17:38,584 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 06:17:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:17:38,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:17:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:17:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:17:39,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:17:39,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:17:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313636987] [2022-01-10 06:17:39,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313636987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:17:39,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:17:39,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:17:39,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026531345] [2022-01-10 06:17:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:17:39,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:17:39,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:17:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:17:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:17:39,036 INFO L87 Difference]: Start difference. First operand 55520 states and 103273 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16)