/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_spec9_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:18:17,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:18:17,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:18:17,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:18:17,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:18:17,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:18:17,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:18:17,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:18:17,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:18:17,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:18:17,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:18:17,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:18:17,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:18:17,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:18:17,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:18:17,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:18:17,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:18:17,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:18:17,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:18:17,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:18:17,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:18:17,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:18:17,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:18:17,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:18:17,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:18:17,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:18:17,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:18:17,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:18:17,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:18:17,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:18:17,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:18:17,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:18:17,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:18:17,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:18:17,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:18:17,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:18:17,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:18:17,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:18:17,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:18:17,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:18:17,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:18:17,824 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 06:18:17,840 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:18:17,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:18:17,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:18:17,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:18:17,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:18:17,841 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:18:17,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:18:17,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:18:17,842 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:18:17,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:18:17,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:18:17,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:18:17,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:18:17,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:18:17,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:18:17,842 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:18:17,843 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:18:17,843 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:18:17,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:18:17,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:18:17,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:18:17,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:18:17,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:18:17,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:18:17,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:18:17,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:18:17,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:18:18,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:18:18,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:18:18,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:18:18,029 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:18:18,043 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:18:18,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec9_product11.cil.c [2022-01-10 06:18:18,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccea8afc8/846a991cb6ff40c59ce8f9b4e511c5fd/FLAGd4c02847d [2022-01-10 06:18:18,536 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:18:18,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec9_product11.cil.c [2022-01-10 06:18:18,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccea8afc8/846a991cb6ff40c59ce8f9b4e511c5fd/FLAGd4c02847d [2022-01-10 06:18:18,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccea8afc8/846a991cb6ff40c59ce8f9b4e511c5fd [2022-01-10 06:18:18,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:18:18,574 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:18:18,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:18:18,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:18:18,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:18:18,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:18:18" (1/1) ... [2022-01-10 06:18:18,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67cc8d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:18, skipping insertion in model container [2022-01-10 06:18:18,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:18:18" (1/1) ... [2022-01-10 06:18:18,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:18:18,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:18:19,026 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_spec9_product11.cil.c[71954,71967] [2022-01-10 06:18:19,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:18:19,037 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:18:19,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:18:19,147 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_spec9_product11.cil.c[71954,71967] [2022-01-10 06:18:19,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:18:19,151 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:18:19,225 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_spec9_product11.cil.c[71954,71967] [2022-01-10 06:18:19,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:18:19,251 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:18:19,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19 WrapperNode [2022-01-10 06:18:19,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:18:19,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:18:19,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:18:19,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:18:19,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,318 INFO L137 Inliner]: procedures = 95, calls = 335, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1032 [2022-01-10 06:18:19,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:18:19,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:18:19,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:18:19,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:18:19,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:18:19,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:18:19,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:18:19,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:18:19,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (1/1) ... [2022-01-10 06:18:19,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:18:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:18:19,431 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 06:18:19,461 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 06:18:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:18:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-01-10 06:18:19,476 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-01-10 06:18:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:18:19,476 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:18:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-01-10 06:18:19,477 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-01-10 06:18:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:18:19,477 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:18:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:18:19,477 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:18:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:18:19,477 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:18:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:18:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:18:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:18:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:18:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-01-10 06:18:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-01-10 06:18:19,478 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:18:19,479 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:18:19,479 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-01-10 06:18:19,479 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-01-10 06:18:19,479 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:18:19,479 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:18:19,479 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:18:19,479 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:18:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:18:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:18:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:18:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:18:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-01-10 06:18:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-01-10 06:18:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:18:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:18:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:18:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:18:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:18:19,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:18:19,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:18:19,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:18:19,481 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:18:19,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:18:19,611 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:18:19,612 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:18:20,342 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:18:20,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:18:20,358 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:18:20,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:18:20 BoogieIcfgContainer [2022-01-10 06:18:20,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:18:20,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:18:20,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:18:20,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:18:20,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:18:18" (1/3) ... [2022-01-10 06:18:20,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e982bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:18:20, skipping insertion in model container [2022-01-10 06:18:20,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:19" (2/3) ... [2022-01-10 06:18:20,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e982bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:18:20, skipping insertion in model container [2022-01-10 06:18:20,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:18:20" (3/3) ... [2022-01-10 06:18:20,365 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2022-01-10 06:18:20,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:18:20,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:18:20,403 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:18:20,409 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 06:18:20,410 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:18:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 545 states, 429 states have (on average 1.6993006993006994) internal successors, (729), 450 states have internal predecessors, (729), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:18:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:18:20,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:20,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:20,456 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1289670013, now seen corresponding path program 1 times [2022-01-10 06:18:20,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:20,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093008999] [2022-01-10 06:18:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:20,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:20,475 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 06:18:20,520 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 06:18:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:18:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:21,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:21,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:21,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093008999] [2022-01-10 06:18:21,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093008999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:21,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:21,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:18:21,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319618876] [2022-01-10 06:18:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:21,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:18:21,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:18:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:18:21,044 INFO L87 Difference]: Start difference. First operand has 545 states, 429 states have (on average 1.6993006993006994) internal successors, (729), 450 states have internal predecessors, (729), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-01-10 06:18:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:21,084 INFO L93 Difference]: Finished difference Result 566 states and 941 transitions. [2022-01-10 06:18:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:18:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2022-01-10 06:18:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:21,102 INFO L225 Difference]: With dead ends: 566 [2022-01-10 06:18:21,102 INFO L226 Difference]: Without dead ends: 537 [2022-01-10 06:18:21,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:18:21,107 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:21,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-10 06:18:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-01-10 06:18:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6973995271867612) internal successors, (718), 442 states have internal predecessors, (718), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 895 transitions. [2022-01-10 06:18:21,164 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 895 transitions. Word has length 104 [2022-01-10 06:18:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:21,166 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 895 transitions. [2022-01-10 06:18:21,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-01-10 06:18:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 895 transitions. [2022-01-10 06:18:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 06:18:21,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:21,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:21,185 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 06:18:21,384 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 06:18:21,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:21,385 INFO L85 PathProgramCache]: Analyzing trace with hash -791622441, now seen corresponding path program 1 times [2022-01-10 06:18:21,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:21,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126197641] [2022-01-10 06:18:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:21,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:21,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:21,387 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 06:18:21,388 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 06:18:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:21,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:21,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:21,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126197641] [2022-01-10 06:18:21,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126197641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:21,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:21,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:21,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844866437] [2022-01-10 06:18:21,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:21,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:21,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:21,781 INFO L87 Difference]: Start difference. First operand 537 states and 895 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:21,849 INFO L93 Difference]: Finished difference Result 1056 states and 1766 transitions. [2022-01-10 06:18:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:21,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 106 [2022-01-10 06:18:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:21,855 INFO L225 Difference]: With dead ends: 1056 [2022-01-10 06:18:21,855 INFO L226 Difference]: Without dead ends: 537 [2022-01-10 06:18:21,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 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 06:18:21,862 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 14 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:21,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2641 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-10 06:18:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-01-10 06:18:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6950354609929077) internal successors, (717), 442 states have internal predecessors, (717), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 894 transitions. [2022-01-10 06:18:21,899 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 894 transitions. Word has length 106 [2022-01-10 06:18:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:21,901 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 894 transitions. [2022-01-10 06:18:21,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 894 transitions. [2022-01-10 06:18:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 06:18:21,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:21,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:21,932 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 06:18:22,123 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 06:18:22,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:22,124 INFO L85 PathProgramCache]: Analyzing trace with hash 851010391, now seen corresponding path program 1 times [2022-01-10 06:18:22,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:22,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050079589] [2022-01-10 06:18:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:22,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:22,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:22,126 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 06:18:22,128 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 06:18:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:22,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:22,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:22,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:22,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050079589] [2022-01-10 06:18:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050079589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:22,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:22,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:22,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981574841] [2022-01-10 06:18:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:22,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:22,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:22,519 INFO L87 Difference]: Start difference. First operand 537 states and 894 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:22,558 INFO L93 Difference]: Finished difference Result 1056 states and 1765 transitions. [2022-01-10 06:18:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 107 [2022-01-10 06:18:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:22,562 INFO L225 Difference]: With dead ends: 1056 [2022-01-10 06:18:22,562 INFO L226 Difference]: Without dead ends: 537 [2022-01-10 06:18:22,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 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 06:18:22,564 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 12 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:22,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2641 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-10 06:18:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-01-10 06:18:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6926713947990544) internal successors, (716), 442 states have internal predecessors, (716), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 893 transitions. [2022-01-10 06:18:22,577 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 893 transitions. Word has length 107 [2022-01-10 06:18:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:22,577 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 893 transitions. [2022-01-10 06:18:22,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 893 transitions. [2022-01-10 06:18:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:18:22,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:22,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:22,590 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 06:18:22,790 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 06:18:22,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:22,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1290038099, now seen corresponding path program 1 times [2022-01-10 06:18:22,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:22,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506048130] [2022-01-10 06:18:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:22,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:22,796 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 06:18:22,798 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 06:18:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:23,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:23,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:23,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506048130] [2022-01-10 06:18:23,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506048130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:23,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:23,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:23,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375105284] [2022-01-10 06:18:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:23,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:23,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:23,176 INFO L87 Difference]: Start difference. First operand 537 states and 893 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:23,213 INFO L93 Difference]: Finished difference Result 1056 states and 1764 transitions. [2022-01-10 06:18:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2022-01-10 06:18:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:23,216 INFO L225 Difference]: With dead ends: 1056 [2022-01-10 06:18:23,216 INFO L226 Difference]: Without dead ends: 537 [2022-01-10 06:18:23,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 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 06:18:23,222 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 10 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:23,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2641 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-10 06:18:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-01-10 06:18:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.690307328605201) internal successors, (715), 442 states have internal predecessors, (715), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 892 transitions. [2022-01-10 06:18:23,238 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 892 transitions. Word has length 108 [2022-01-10 06:18:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:23,238 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 892 transitions. [2022-01-10 06:18:23,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 892 transitions. [2022-01-10 06:18:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 06:18:23,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:23,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:23,257 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 06:18:23,452 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 06:18:23,453 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1222954669, now seen corresponding path program 1 times [2022-01-10 06:18:23,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:23,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858297515] [2022-01-10 06:18:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:23,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:23,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:23,455 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 06:18:23,456 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 06:18:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:23,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:23,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858297515] [2022-01-10 06:18:23,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858297515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:23,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:23,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:23,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293886914] [2022-01-10 06:18:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:23,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:23,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:23,848 INFO L87 Difference]: Start difference. First operand 537 states and 892 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:23,881 INFO L93 Difference]: Finished difference Result 1056 states and 1763 transitions. [2022-01-10 06:18:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 109 [2022-01-10 06:18:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:23,884 INFO L225 Difference]: With dead ends: 1056 [2022-01-10 06:18:23,884 INFO L226 Difference]: Without dead ends: 537 [2022-01-10 06:18:23,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 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 06:18:23,886 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 8 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:23,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2641 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-10 06:18:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-01-10 06:18:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6879432624113475) internal successors, (714), 442 states have internal predecessors, (714), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 891 transitions. [2022-01-10 06:18:23,897 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 891 transitions. Word has length 109 [2022-01-10 06:18:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:23,897 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 891 transitions. [2022-01-10 06:18:23,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 891 transitions. [2022-01-10 06:18:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:18:23,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:23,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:23,918 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 06:18:24,116 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 06:18:24,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash -759301681, now seen corresponding path program 1 times [2022-01-10 06:18:24,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:24,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277419954] [2022-01-10 06:18:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:24,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:24,119 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 06:18:24,120 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 06:18:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:24,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:24,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:24,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:24,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277419954] [2022-01-10 06:18:24,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277419954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:24,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:24,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:24,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491680708] [2022-01-10 06:18:24,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:24,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:24,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:24,456 INFO L87 Difference]: Start difference. First operand 537 states and 891 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:24,488 INFO L93 Difference]: Finished difference Result 1056 states and 1762 transitions. [2022-01-10 06:18:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 110 [2022-01-10 06:18:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:24,491 INFO L225 Difference]: With dead ends: 1056 [2022-01-10 06:18:24,491 INFO L226 Difference]: Without dead ends: 537 [2022-01-10 06:18:24,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 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 06:18:24,493 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 6 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:24,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2641 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-10 06:18:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-01-10 06:18:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6855791962174942) internal successors, (713), 442 states have internal predecessors, (713), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 890 transitions. [2022-01-10 06:18:24,505 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 890 transitions. Word has length 110 [2022-01-10 06:18:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:24,505 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 890 transitions. [2022-01-10 06:18:24,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 890 transitions. [2022-01-10 06:18:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:18:24,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:24,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:24,518 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 06:18:24,718 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 06:18:24,718 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1786056527, now seen corresponding path program 1 times [2022-01-10 06:18:24,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397893470] [2022-01-10 06:18:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:24,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:24,721 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 06:18:24,721 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 06:18:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:24,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:18:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:25,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:25,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:25,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397893470] [2022-01-10 06:18:25,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397893470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:25,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:25,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:18:25,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743500304] [2022-01-10 06:18:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:25,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:18:25,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:18:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:18:25,115 INFO L87 Difference]: Start difference. First operand 537 states and 890 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:25,220 INFO L93 Difference]: Finished difference Result 1022 states and 1694 transitions. [2022-01-10 06:18:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:18:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 111 [2022-01-10 06:18:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:25,230 INFO L225 Difference]: With dead ends: 1022 [2022-01-10 06:18:25,230 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:18:25,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 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 06:18:25,234 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 117 mSDsluCounter, 4303 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5182 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:25,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5182 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:18:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:18:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2022-01-10 06:18:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 433 states have (on average 1.6812933025404158) internal successors, (728), 454 states have internal predecessors, (728), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2022-01-10 06:18:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 909 transitions. [2022-01-10 06:18:25,248 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 909 transitions. Word has length 111 [2022-01-10 06:18:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:25,248 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 909 transitions. [2022-01-10 06:18:25,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 909 transitions. [2022-01-10 06:18:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:18:25,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:25,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:25,263 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 06:18:25,463 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 06:18:25,464 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash 976569070, now seen corresponding path program 1 times [2022-01-10 06:18:25,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:25,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245849783] [2022-01-10 06:18:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:25,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:25,466 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 06:18:25,468 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 06:18:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:25,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:25,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245849783] [2022-01-10 06:18:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245849783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:25,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:25,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:25,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391741260] [2022-01-10 06:18:25,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:25,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:25,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:25,807 INFO L87 Difference]: Start difference. First operand 550 states and 909 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:25,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:25,862 INFO L93 Difference]: Finished difference Result 1074 states and 1788 transitions. [2022-01-10 06:18:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:25,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 111 [2022-01-10 06:18:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:25,866 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 06:18:25,866 INFO L226 Difference]: Without dead ends: 531 [2022-01-10 06:18:25,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 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 06:18:25,868 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 3 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 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 06:18:25,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 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 06:18:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-10 06:18:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2022-01-10 06:18:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.6762589928057554) internal successors, (699), 436 states have internal predecessors, (699), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 876 transitions. [2022-01-10 06:18:25,880 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 876 transitions. Word has length 111 [2022-01-10 06:18:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:25,880 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 876 transitions. [2022-01-10 06:18:25,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 876 transitions. [2022-01-10 06:18:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:18:25,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:25,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:25,896 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 06:18:26,094 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 06:18:26,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:26,096 INFO L85 PathProgramCache]: Analyzing trace with hash -209131246, now seen corresponding path program 1 times [2022-01-10 06:18:26,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:26,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297920486] [2022-01-10 06:18:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:26,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:26,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:26,097 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 06:18:26,098 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 06:18:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:26,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:26,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:26,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:26,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297920486] [2022-01-10 06:18:26,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297920486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:26,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:26,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:26,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916886517] [2022-01-10 06:18:26,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:26,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:26,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:26,430 INFO L87 Difference]: Start difference. First operand 531 states and 876 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:26,514 INFO L93 Difference]: Finished difference Result 1010 states and 1672 transitions. [2022-01-10 06:18:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:26,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 112 [2022-01-10 06:18:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:26,522 INFO L225 Difference]: With dead ends: 1010 [2022-01-10 06:18:26,522 INFO L226 Difference]: Without dead ends: 531 [2022-01-10 06:18:26,535 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 06:18:26,536 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 90 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2455 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:26,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 2455 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:18:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-10 06:18:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2022-01-10 06:18:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.6666666666666667) internal successors, (695), 436 states have internal predecessors, (695), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 872 transitions. [2022-01-10 06:18:26,549 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 872 transitions. Word has length 112 [2022-01-10 06:18:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:26,549 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 872 transitions. [2022-01-10 06:18:26,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 872 transitions. [2022-01-10 06:18:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:18:26,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:26,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:26,564 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 06:18:26,762 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 06:18:26,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1031048238, now seen corresponding path program 1 times [2022-01-10 06:18:26,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:26,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937390053] [2022-01-10 06:18:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:26,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:26,765 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 06:18:26,768 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 06:18:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:27,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:27,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:27,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937390053] [2022-01-10 06:18:27,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937390053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:27,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:27,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641405779] [2022-01-10 06:18:27,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:27,107 INFO L87 Difference]: Start difference. First operand 531 states and 872 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, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:27,206 INFO L93 Difference]: Finished difference Result 1010 states and 1668 transitions. [2022-01-10 06:18:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:27,210 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, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2022-01-10 06:18:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:27,213 INFO L225 Difference]: With dead ends: 1010 [2022-01-10 06:18:27,213 INFO L226 Difference]: Without dead ends: 531 [2022-01-10 06:18:27,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 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 06:18:27,223 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 85 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2455 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:27,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2455 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:18:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-10 06:18:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2022-01-10 06:18:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.6570743405275778) internal successors, (691), 436 states have internal predecessors, (691), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 868 transitions. [2022-01-10 06:18:27,235 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 868 transitions. Word has length 113 [2022-01-10 06:18:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:27,235 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 868 transitions. [2022-01-10 06:18:27,235 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, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 868 transitions. [2022-01-10 06:18:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:18:27,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:27,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:27,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:18:27,451 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 06:18:27,452 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:27,452 INFO L85 PathProgramCache]: Analyzing trace with hash -58878121, now seen corresponding path program 1 times [2022-01-10 06:18:27,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:27,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258630624] [2022-01-10 06:18:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:27,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:27,454 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 06:18:27,454 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 06:18:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:27,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:27,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258630624] [2022-01-10 06:18:27,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258630624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:27,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:27,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:27,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086533186] [2022-01-10 06:18:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:27,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:27,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:27,817 INFO L87 Difference]: Start difference. First operand 531 states and 868 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:27,904 INFO L93 Difference]: Finished difference Result 1010 states and 1664 transitions. [2022-01-10 06:18:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:27,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2022-01-10 06:18:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:27,908 INFO L225 Difference]: With dead ends: 1010 [2022-01-10 06:18:27,908 INFO L226 Difference]: Without dead ends: 531 [2022-01-10 06:18:27,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 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 06:18:27,911 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 80 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2455 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:27,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 2455 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:18:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-10 06:18:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2022-01-10 06:18:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.6474820143884892) internal successors, (687), 436 states have internal predecessors, (687), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 864 transitions. [2022-01-10 06:18:27,930 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 864 transitions. Word has length 114 [2022-01-10 06:18:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:27,931 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 864 transitions. [2022-01-10 06:18:27,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 864 transitions. [2022-01-10 06:18:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:18:27,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:27,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:27,958 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 06:18:28,144 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 06:18:28,145 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash 936457175, now seen corresponding path program 1 times [2022-01-10 06:18:28,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:28,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376209090] [2022-01-10 06:18:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:28,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:28,147 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 06:18:28,148 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 06:18:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:18:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:28,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:28,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:28,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376209090] [2022-01-10 06:18:28,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376209090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:28,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:28,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:18:28,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425662613] [2022-01-10 06:18:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:28,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:18:28,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:18:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:18:28,509 INFO L87 Difference]: Start difference. First operand 531 states and 864 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:28,568 INFO L93 Difference]: Finished difference Result 1010 states and 1660 transitions. [2022-01-10 06:18:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:18:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 114 [2022-01-10 06:18:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:28,571 INFO L225 Difference]: With dead ends: 1010 [2022-01-10 06:18:28,572 INFO L226 Difference]: Without dead ends: 510 [2022-01-10 06:18:28,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 06:18:28,574 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 110 mSDsluCounter, 4176 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5028 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:28,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5028 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-10 06:18:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-01-10 06:18:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.648989898989899) internal successors, (653), 415 states have internal predecessors, (653), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 830 transitions. [2022-01-10 06:18:28,584 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 830 transitions. Word has length 114 [2022-01-10 06:18:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:28,584 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 830 transitions. [2022-01-10 06:18:28,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 830 transitions. [2022-01-10 06:18:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:18:28,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:28,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:28,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 06:18:28,803 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 06:18:28,804 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash 695417527, now seen corresponding path program 1 times [2022-01-10 06:18:28,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:28,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227864101] [2022-01-10 06:18:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:28,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:28,806 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 06:18:28,806 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 06:18:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:29,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:29,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:29,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227864101] [2022-01-10 06:18:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227864101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:29,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:29,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:29,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470136981] [2022-01-10 06:18:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:29,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:29,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:29,188 INFO L87 Difference]: Start difference. First operand 510 states and 830 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:29,237 INFO L93 Difference]: Finished difference Result 989 states and 1626 transitions. [2022-01-10 06:18:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2022-01-10 06:18:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:29,241 INFO L225 Difference]: With dead ends: 989 [2022-01-10 06:18:29,241 INFO L226 Difference]: Without dead ends: 510 [2022-01-10 06:18:29,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 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 06:18:29,243 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 41 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:29,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2441 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-10 06:18:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-01-10 06:18:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.6464646464646464) internal successors, (652), 415 states have internal predecessors, (652), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 829 transitions. [2022-01-10 06:18:29,253 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 829 transitions. Word has length 115 [2022-01-10 06:18:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:29,253 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 829 transitions. [2022-01-10 06:18:29,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 829 transitions. [2022-01-10 06:18:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-10 06:18:29,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:29,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:29,268 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 06:18:29,471 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 06:18:29,471 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1009428068, now seen corresponding path program 1 times [2022-01-10 06:18:29,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:29,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375565778] [2022-01-10 06:18:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:29,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:29,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:29,473 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 06:18:29,474 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 06:18:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:29,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:29,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:29,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:29,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:29,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375565778] [2022-01-10 06:18:29,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375565778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:29,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:29,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:29,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600636263] [2022-01-10 06:18:29,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:29,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:29,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:29,838 INFO L87 Difference]: Start difference. First operand 510 states and 829 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:29,886 INFO L93 Difference]: Finished difference Result 989 states and 1625 transitions. [2022-01-10 06:18:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:29,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2022-01-10 06:18:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:29,890 INFO L225 Difference]: With dead ends: 989 [2022-01-10 06:18:29,890 INFO L226 Difference]: Without dead ends: 510 [2022-01-10 06:18:29,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 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 06:18:29,891 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 39 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:29,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2441 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-10 06:18:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-01-10 06:18:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.643939393939394) internal successors, (651), 415 states have internal predecessors, (651), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 828 transitions. [2022-01-10 06:18:29,904 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 828 transitions. Word has length 116 [2022-01-10 06:18:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:29,904 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 828 transitions. [2022-01-10 06:18:29,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 828 transitions. [2022-01-10 06:18:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-10 06:18:29,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:29,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:29,920 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 06:18:30,120 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 06:18:30,120 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2070450206, now seen corresponding path program 1 times [2022-01-10 06:18:30,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716219849] [2022-01-10 06:18:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:30,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:30,122 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 06:18:30,124 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 06:18:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:18:30,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:30,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:30,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:30,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716219849] [2022-01-10 06:18:30,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716219849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:30,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:30,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:30,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394583079] [2022-01-10 06:18:30,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:30,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:18:30,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:18:30,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:18:30,471 INFO L87 Difference]: Start difference. First operand 510 states and 828 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:30,502 INFO L93 Difference]: Finished difference Result 989 states and 1624 transitions. [2022-01-10 06:18:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:18:30,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-01-10 06:18:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:30,505 INFO L225 Difference]: With dead ends: 989 [2022-01-10 06:18:30,505 INFO L226 Difference]: Without dead ends: 510 [2022-01-10 06:18:30,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 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 06:18:30,507 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 37 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2441 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 06:18:30,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2441 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-10 06:18:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-01-10 06:18:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.6414141414141414) internal successors, (650), 415 states have internal predecessors, (650), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 827 transitions. [2022-01-10 06:18:30,516 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 827 transitions. Word has length 117 [2022-01-10 06:18:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:30,516 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 827 transitions. [2022-01-10 06:18:30,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:18:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 827 transitions. [2022-01-10 06:18:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-10 06:18:30,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:30,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:30,529 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 06:18:30,729 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 06:18:30,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:30,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1638240868, now seen corresponding path program 1 times [2022-01-10 06:18:30,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:30,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152522882] [2022-01-10 06:18:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:30,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:30,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:30,731 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 06:18:30,732 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 06:18:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:18:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:18:31,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:31,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:31,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152522882] [2022-01-10 06:18:31,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152522882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:31,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:31,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:18:31,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858530225] [2022-01-10 06:18:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:31,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:18:31,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:18:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:18:31,103 INFO L87 Difference]: Start difference. First operand 510 states and 827 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:31,193 INFO L93 Difference]: Finished difference Result 983 states and 1612 transitions. [2022-01-10 06:18:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:18:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2022-01-10 06:18:31,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:31,196 INFO L225 Difference]: With dead ends: 983 [2022-01-10 06:18:31,196 INFO L226 Difference]: Without dead ends: 510 [2022-01-10 06:18:31,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 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 06:18:31,197 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 30 mSDsluCounter, 4851 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5663 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:31,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 5663 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:18:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-10 06:18:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-01-10 06:18:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.6388888888888888) internal successors, (649), 415 states have internal predecessors, (649), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:18:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 826 transitions. [2022-01-10 06:18:31,208 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 826 transitions. Word has length 117 [2022-01-10 06:18:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:31,208 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 826 transitions. [2022-01-10 06:18:31,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 826 transitions. [2022-01-10 06:18:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-10 06:18:31,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:31,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:31,231 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 06:18:31,431 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 06:18:31,431 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash -365765455, now seen corresponding path program 1 times [2022-01-10 06:18:31,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:31,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364563577] [2022-01-10 06:18:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:31,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:31,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:31,434 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 06:18:31,434 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 06:18:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:31,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:18:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:18:31,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:31,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364563577] [2022-01-10 06:18:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364563577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:31,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:31,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:31,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86558961] [2022-01-10 06:18:31,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:31,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:18:31,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:18:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:18:31,808 INFO L87 Difference]: Start difference. First operand 510 states and 826 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:32,249 INFO L93 Difference]: Finished difference Result 979 states and 1629 transitions. [2022-01-10 06:18:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:18:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 118 [2022-01-10 06:18:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:32,253 INFO L225 Difference]: With dead ends: 979 [2022-01-10 06:18:32,253 INFO L226 Difference]: Without dead ends: 514 [2022-01-10 06:18:32,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 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 06:18:32,255 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 774 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:32,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2063 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:18:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-10 06:18:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-01-10 06:18:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6340852130325814) internal successors, (652), 418 states have internal predecessors, (652), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2022-01-10 06:18:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 830 transitions. [2022-01-10 06:18:32,266 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 830 transitions. Word has length 118 [2022-01-10 06:18:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:32,266 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 830 transitions. [2022-01-10 06:18:32,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 830 transitions. [2022-01-10 06:18:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 06:18:32,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:32,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:32,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:18:32,479 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 06:18:32,479 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1709795483, now seen corresponding path program 1 times [2022-01-10 06:18:32,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:32,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651442064] [2022-01-10 06:18:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:32,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:32,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:32,481 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 06:18:32,482 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 06:18:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:18:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:18:32,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:32,885 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:32,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651442064] [2022-01-10 06:18:32,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651442064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:32,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:32,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:32,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281768032] [2022-01-10 06:18:32,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:32,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:18:32,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:18:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:18:32,887 INFO L87 Difference]: Start difference. First operand 514 states and 830 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:33,349 INFO L93 Difference]: Finished difference Result 988 states and 1636 transitions. [2022-01-10 06:18:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:18:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2022-01-10 06:18:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:33,352 INFO L225 Difference]: With dead ends: 988 [2022-01-10 06:18:33,352 INFO L226 Difference]: Without dead ends: 519 [2022-01-10 06:18:33,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 06:18:33,354 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 775 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:33,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2064 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:18:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-10 06:18:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-01-10 06:18:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 403 states have (on average 1.6277915632754343) internal successors, (656), 422 states have internal predecessors, (656), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (88), 84 states have call predecessors, (88), 86 states have call successors, (88) [2022-01-10 06:18:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 835 transitions. [2022-01-10 06:18:33,364 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 835 transitions. Word has length 120 [2022-01-10 06:18:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:33,364 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 835 transitions. [2022-01-10 06:18:33,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 835 transitions. [2022-01-10 06:18:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-10 06:18:33,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:33,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:33,386 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 06:18:33,577 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 06:18:33,577 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash 273910961, now seen corresponding path program 1 times [2022-01-10 06:18:33,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:33,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424508496] [2022-01-10 06:18:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:33,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:33,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:33,579 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 06:18:33,600 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 06:18:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:18:33,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:18:33,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:33,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:33,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424508496] [2022-01-10 06:18:33,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424508496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:33,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:33,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:33,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375862247] [2022-01-10 06:18:33,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:33,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:18:33,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:18:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:18:33,980 INFO L87 Difference]: Start difference. First operand 519 states and 835 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:34,434 INFO L93 Difference]: Finished difference Result 999 states and 1645 transitions. [2022-01-10 06:18:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:18:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2022-01-10 06:18:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:34,437 INFO L225 Difference]: With dead ends: 999 [2022-01-10 06:18:34,437 INFO L226 Difference]: Without dead ends: 525 [2022-01-10 06:18:34,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 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 06:18:34,439 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 775 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:34,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2064 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:18:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-10 06:18:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-01-10 06:18:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6200980392156863) internal successors, (661), 427 states have internal predecessors, (661), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (89), 84 states have call predecessors, (89), 86 states have call successors, (89) [2022-01-10 06:18:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 841 transitions. [2022-01-10 06:18:34,450 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 841 transitions. Word has length 122 [2022-01-10 06:18:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:34,450 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 841 transitions. [2022-01-10 06:18:34,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 841 transitions. [2022-01-10 06:18:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:18:34,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:34,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:34,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:18:34,664 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 06:18:34,664 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash 965977491, now seen corresponding path program 1 times [2022-01-10 06:18:34,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:34,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712355887] [2022-01-10 06:18:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:34,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:34,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:34,666 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 06:18:34,673 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 06:18:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:18:34,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:18:35,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:35,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712355887] [2022-01-10 06:18:35,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712355887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:35,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:35,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:18:35,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463675345] [2022-01-10 06:18:35,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:35,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:18:35,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:18:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:18:35,085 INFO L87 Difference]: Start difference. First operand 525 states and 841 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:35,527 INFO L93 Difference]: Finished difference Result 1012 states and 1656 transitions. [2022-01-10 06:18:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:18:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2022-01-10 06:18:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:35,530 INFO L225 Difference]: With dead ends: 1012 [2022-01-10 06:18:35,530 INFO L226 Difference]: Without dead ends: 532 [2022-01-10 06:18:35,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 06:18:35,532 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 764 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:35,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 2064 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:18:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-10 06:18:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-01-10 06:18:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 414 states have (on average 1.6111111111111112) internal successors, (667), 433 states have internal predecessors, (667), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2022-01-10 06:18:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 848 transitions. [2022-01-10 06:18:35,542 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 848 transitions. Word has length 124 [2022-01-10 06:18:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:35,543 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 848 transitions. [2022-01-10 06:18:35,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:18:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 848 transitions. [2022-01-10 06:18:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-10 06:18:35,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:35,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:35,561 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 06:18:35,755 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 06:18:35,756 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:35,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1102015153, now seen corresponding path program 1 times [2022-01-10 06:18:35,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:35,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953695304] [2022-01-10 06:18:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:35,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:35,758 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 06:18:35,758 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 06:18:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:35,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:18:35,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:18:36,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:18:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:18:36,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953695304] [2022-01-10 06:18:36,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953695304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:18:36,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:18:36,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-01-10 06:18:36,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309922064] [2022-01-10 06:18:36,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:18:36,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:18:36,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:18:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:18:36,922 INFO L87 Difference]: Start difference. First operand 532 states and 848 transitions. Second operand has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (27), 5 states have call predecessors, (27), 10 states have return successors, (28), 12 states have call predecessors, (28), 7 states have call successors, (28) [2022-01-10 06:18:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:42,334 INFO L93 Difference]: Finished difference Result 1757 states and 2887 transitions. [2022-01-10 06:18:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:18:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (27), 5 states have call predecessors, (27), 10 states have return successors, (28), 12 states have call predecessors, (28), 7 states have call successors, (28) Word has length 126 [2022-01-10 06:18:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:42,340 INFO L225 Difference]: With dead ends: 1757 [2022-01-10 06:18:42,340 INFO L226 Difference]: Without dead ends: 1270 [2022-01-10 06:18:42,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:18:42,342 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 5915 mSDsluCounter, 3902 mSDsCounter, 0 mSdLazyCounter, 7634 mSolverCounterSat, 2241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5988 SdHoareTripleChecker+Valid, 5556 SdHoareTripleChecker+Invalid, 9875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2241 IncrementalHoareTripleChecker+Valid, 7634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:42,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5988 Valid, 5556 Invalid, 9875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2241 Valid, 7634 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-01-10 06:18:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-01-10 06:18:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1126. [2022-01-10 06:18:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 859 states have (on average 1.6181606519208382) internal successors, (1390), 899 states have internal predecessors, (1390), 210 states have call successors, (210), 50 states have call predecessors, (210), 56 states have return successors, (232), 207 states have call predecessors, (232), 205 states have call successors, (232) [2022-01-10 06:18:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1832 transitions. [2022-01-10 06:18:42,386 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1832 transitions. Word has length 126 [2022-01-10 06:18:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:42,386 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1832 transitions. [2022-01-10 06:18:42,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (27), 5 states have call predecessors, (27), 10 states have return successors, (28), 12 states have call predecessors, (28), 7 states have call successors, (28) [2022-01-10 06:18:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1832 transitions. [2022-01-10 06:18:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 06:18:42,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:42,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:42,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:18:42,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:18:42,600 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash -899617050, now seen corresponding path program 1 times [2022-01-10 06:18:42,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:42,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772652895] [2022-01-10 06:18:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:42,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:42,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:42,602 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:18:42,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:18:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:18:42,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:18:42,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:42,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:42,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772652895] [2022-01-10 06:18:42,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772652895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:42,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:42,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:18:42,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349379140] [2022-01-10 06:18:42,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:42,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:18:42,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:18:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:18:42,996 INFO L87 Difference]: Start difference. First operand 1126 states and 1832 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:43,071 INFO L93 Difference]: Finished difference Result 1616 states and 2630 transitions. [2022-01-10 06:18:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:18:43,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 129 [2022-01-10 06:18:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:43,075 INFO L225 Difference]: With dead ends: 1616 [2022-01-10 06:18:43,075 INFO L226 Difference]: Without dead ends: 524 [2022-01-10 06:18:43,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 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 06:18:43,079 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 26 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 5608 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:43,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 5608 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-10 06:18:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-01-10 06:18:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 408 states have (on average 1.6053921568627452) internal successors, (655), 427 states have internal predecessors, (655), 89 states have call successors, (89), 27 states have call predecessors, (89), 26 states have return successors, (88), 82 states have call predecessors, (88), 84 states have call successors, (88) [2022-01-10 06:18:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 832 transitions. [2022-01-10 06:18:43,091 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 832 transitions. Word has length 129 [2022-01-10 06:18:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:43,092 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 832 transitions. [2022-01-10 06:18:43,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:18:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 832 transitions. [2022-01-10 06:18:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 06:18:43,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:43,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:43,111 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 06:18:43,304 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 06:18:43,305 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1878839800, now seen corresponding path program 1 times [2022-01-10 06:18:43,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:43,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031716439] [2022-01-10 06:18:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:43,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:43,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:43,307 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 06:18:43,308 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 06:18:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:43,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:18:43,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:18:43,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:18:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:18:44,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031716439] [2022-01-10 06:18:44,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031716439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:18:44,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:18:44,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:18:44,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593911976] [2022-01-10 06:18:44,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:18:44,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:18:44,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:44,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:18:44,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:18:44,307 INFO L87 Difference]: Start difference. First operand 524 states and 832 transitions. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 12 states have internal predecessors, (159), 8 states have call successors, (28), 5 states have call predecessors, (28), 8 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2022-01-10 06:18:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:46,277 INFO L93 Difference]: Finished difference Result 1012 states and 1635 transitions. [2022-01-10 06:18:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:18:46,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 12 states have internal predecessors, (159), 8 states have call successors, (28), 5 states have call predecessors, (28), 8 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) Word has length 132 [2022-01-10 06:18:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:46,280 INFO L225 Difference]: With dead ends: 1012 [2022-01-10 06:18:46,280 INFO L226 Difference]: Without dead ends: 530 [2022-01-10 06:18:46,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:18:46,282 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1885 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 3868 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1885 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 4380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 3868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:46,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1885 Valid, 2646 Invalid, 4380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 3868 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 06:18:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-10 06:18:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 528. [2022-01-10 06:18:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 411 states have (on average 1.6009732360097324) internal successors, (658), 430 states have internal predecessors, (658), 89 states have call successors, (89), 27 states have call predecessors, (89), 27 states have return successors, (93), 83 states have call predecessors, (93), 84 states have call successors, (93) [2022-01-10 06:18:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 840 transitions. [2022-01-10 06:18:46,299 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 840 transitions. Word has length 132 [2022-01-10 06:18:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:46,300 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 840 transitions. [2022-01-10 06:18:46,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 12 states have internal predecessors, (159), 8 states have call successors, (28), 5 states have call predecessors, (28), 8 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2022-01-10 06:18:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 840 transitions. [2022-01-10 06:18:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:18:46,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:46,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:46,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:18:46,527 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 06:18:46,527 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash 68984969, now seen corresponding path program 1 times [2022-01-10 06:18:46,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700631227] [2022-01-10 06:18:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:46,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:46,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:46,530 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 06:18:46,531 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 06:18:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:18:46,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:18:46,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:18:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:18:47,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:47,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700631227] [2022-01-10 06:18:47,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700631227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:18:47,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:18:47,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-01-10 06:18:47,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906673924] [2022-01-10 06:18:47,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:18:47,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:18:47,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:18:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:18:47,312 INFO L87 Difference]: Start difference. First operand 528 states and 840 transitions. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) [2022-01-10 06:18:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:50,817 INFO L93 Difference]: Finished difference Result 1958 states and 3195 transitions. [2022-01-10 06:18:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:18:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-01-10 06:18:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:50,827 INFO L225 Difference]: With dead ends: 1958 [2022-01-10 06:18:50,827 INFO L226 Difference]: Without dead ends: 1472 [2022-01-10 06:18:50,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:18:50,829 INFO L933 BasicCegarLoop]: 1292 mSDtfsCounter, 3904 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 4639 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 5737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 4639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:50,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3974 Valid, 3291 Invalid, 5737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 4639 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-10 06:18:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2022-01-10 06:18:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1419. [2022-01-10 06:18:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1105 states have (on average 1.6090497737556562) internal successors, (1778), 1151 states have internal predecessors, (1778), 239 states have call successors, (239), 74 states have call predecessors, (239), 74 states have return successors, (267), 230 states have call predecessors, (267), 234 states have call successors, (267) [2022-01-10 06:18:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2284 transitions. [2022-01-10 06:18:50,865 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2284 transitions. Word has length 133 [2022-01-10 06:18:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:50,865 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 2284 transitions. [2022-01-10 06:18:50,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) [2022-01-10 06:18:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2284 transitions. [2022-01-10 06:18:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-10 06:18:50,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:50,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:50,886 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 06:18:51,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:18:51,080 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1880899435, now seen corresponding path program 1 times [2022-01-10 06:18:51,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466077627] [2022-01-10 06:18:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:51,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:51,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:51,082 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 06:18:51,083 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 06:18:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:18:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:18:51,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:51,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466077627] [2022-01-10 06:18:51,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466077627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:51,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:51,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:18:51,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715824265] [2022-01-10 06:18:51,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:51,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:18:51,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:18:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:18:51,570 INFO L87 Difference]: Start difference. First operand 1419 states and 2284 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-01-10 06:18:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:54,800 INFO L93 Difference]: Finished difference Result 4783 states and 7936 transitions. [2022-01-10 06:18:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:18:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 135 [2022-01-10 06:18:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:54,817 INFO L225 Difference]: With dead ends: 4783 [2022-01-10 06:18:54,817 INFO L226 Difference]: Without dead ends: 3406 [2022-01-10 06:18:54,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:18:54,822 INFO L933 BasicCegarLoop]: 1497 mSDtfsCounter, 3122 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 4261 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3241 SdHoareTripleChecker+Valid, 3086 SdHoareTripleChecker+Invalid, 5026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 4261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:54,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3241 Valid, 3086 Invalid, 5026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 4261 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 06:18:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2022-01-10 06:18:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3275. [2022-01-10 06:18:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 2446 states have (on average 1.6022076860179886) internal successors, (3919), 2588 states have internal predecessors, (3919), 672 states have call successors, (672), 143 states have call predecessors, (672), 156 states have return successors, (835), 665 states have call predecessors, (835), 667 states have call successors, (835) [2022-01-10 06:18:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 5426 transitions. [2022-01-10 06:18:54,921 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 5426 transitions. Word has length 135 [2022-01-10 06:18:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:54,921 INFO L470 AbstractCegarLoop]: Abstraction has 3275 states and 5426 transitions. [2022-01-10 06:18:54,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-01-10 06:18:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 5426 transitions. [2022-01-10 06:18:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-10 06:18:54,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:54,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:54,938 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 06:18:55,138 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 06:18:55,138 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:55,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1109674132, now seen corresponding path program 1 times [2022-01-10 06:18:55,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:55,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942447869] [2022-01-10 06:18:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:55,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:55,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:55,140 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 06:18:55,141 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 06:18:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:18:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:18:55,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:55,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942447869] [2022-01-10 06:18:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942447869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:55,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:55,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:18:55,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529252297] [2022-01-10 06:18:55,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:55,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:18:55,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:18:55,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:18:55,539 INFO L87 Difference]: Start difference. First operand 3275 states and 5426 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:18:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:58,465 INFO L93 Difference]: Finished difference Result 9021 states and 14976 transitions. [2022-01-10 06:18:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:18:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 135 [2022-01-10 06:18:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:58,498 INFO L225 Difference]: With dead ends: 9021 [2022-01-10 06:18:58,498 INFO L226 Difference]: Without dead ends: 6567 [2022-01-10 06:18:58,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:18:58,510 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 2860 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 3541 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2923 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 4120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 3541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:18:58,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2923 Valid, 2531 Invalid, 4120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 3541 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 06:18:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2022-01-10 06:18:58,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 6324. [2022-01-10 06:18:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 4771 states have (on average 1.5954726472437644) internal successors, (7612), 5036 states have internal predecessors, (7612), 1218 states have call successors, (1218), 277 states have call predecessors, (1218), 334 states have return successors, (1616), 1212 states have call predecessors, (1616), 1213 states have call successors, (1616) [2022-01-10 06:18:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 10446 transitions. [2022-01-10 06:18:58,759 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 10446 transitions. Word has length 135 [2022-01-10 06:18:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 6324 states and 10446 transitions. [2022-01-10 06:18:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:18:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 10446 transitions. [2022-01-10 06:18:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-10 06:18:58,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:58,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:18:58,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:18:58,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:18:58,973 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:58,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash -728140532, now seen corresponding path program 1 times [2022-01-10 06:18:58,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:58,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687763299] [2022-01-10 06:18:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:58,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:58,975 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:18:58,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:18:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:18:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:18:59,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:59,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:59,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687763299] [2022-01-10 06:18:59,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687763299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:59,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:59,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-10 06:18:59,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235760196] [2022-01-10 06:18:59,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:59,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:18:59,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:18:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:18:59,482 INFO L87 Difference]: Start difference. First operand 6324 states and 10446 transitions. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 9 states have internal predecessors, (94), 6 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-10 06:19:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:01,492 INFO L93 Difference]: Finished difference Result 11775 states and 19496 transitions. [2022-01-10 06:19:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:19:01,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 9 states have internal predecessors, (94), 6 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) Word has length 137 [2022-01-10 06:19:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:01,522 INFO L225 Difference]: With dead ends: 11775 [2022-01-10 06:19:01,522 INFO L226 Difference]: Without dead ends: 6276 [2022-01-10 06:19:01,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:19:01,540 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1360 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 4027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:01,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 2641 Invalid, 4027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 06:19:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2022-01-10 06:19:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 6276. [2022-01-10 06:19:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6276 states, 4745 states have (on average 1.5957850368809272) internal successors, (7572), 5006 states have internal predecessors, (7572), 1204 states have call successors, (1204), 273 states have call predecessors, (1204), 326 states have return successors, (1594), 1198 states have call predecessors, (1594), 1199 states have call successors, (1594) [2022-01-10 06:19:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 10370 transitions. [2022-01-10 06:19:01,783 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 10370 transitions. Word has length 137 [2022-01-10 06:19:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:01,784 INFO L470 AbstractCegarLoop]: Abstraction has 6276 states and 10370 transitions. [2022-01-10 06:19:01,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 9 states have internal predecessors, (94), 6 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-10 06:19:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 10370 transitions. [2022-01-10 06:19:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 06:19:01,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:01,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:01,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-01-10 06:19:01,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:01,997 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1696272062, now seen corresponding path program 1 times [2022-01-10 06:19:01,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:01,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930531357] [2022-01-10 06:19:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:01,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:01,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:01,999 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:02,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:19:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:02,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:19:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:02,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:02,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:02,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930531357] [2022-01-10 06:19:02,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930531357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:02,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:02,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:19:02,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631509710] [2022-01-10 06:19:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:02,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:19:02,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:19:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:19:02,523 INFO L87 Difference]: Start difference. First operand 6276 states and 10370 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 8 states have internal predecessors, (95), 5 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 06:19:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:05,834 INFO L93 Difference]: Finished difference Result 12818 states and 21048 transitions. [2022-01-10 06:19:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:19:05,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 8 states have internal predecessors, (95), 5 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 140 [2022-01-10 06:19:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:05,867 INFO L225 Difference]: With dead ends: 12818 [2022-01-10 06:19:05,867 INFO L226 Difference]: Without dead ends: 7341 [2022-01-10 06:19:05,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:19:05,884 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 1924 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1988 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 5176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:05,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1988 Valid, 2835 Invalid, 5176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 4700 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 06:19:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2022-01-10 06:19:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 6956. [2022-01-10 06:19:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 5249 states have (on average 1.5641074490379119) internal successors, (8210), 5540 states have internal predecessors, (8210), 1304 states have call successors, (1304), 337 states have call predecessors, (1304), 402 states have return successors, (1772), 1280 states have call predecessors, (1772), 1299 states have call successors, (1772) [2022-01-10 06:19:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 11286 transitions. [2022-01-10 06:19:06,122 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 11286 transitions. Word has length 140 [2022-01-10 06:19:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:06,122 INFO L470 AbstractCegarLoop]: Abstraction has 6956 states and 11286 transitions. [2022-01-10 06:19:06,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 8 states have internal predecessors, (95), 5 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 06:19:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 11286 transitions. [2022-01-10 06:19:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 06:19:06,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:06,125 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:06,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 06:19:06,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:06,335 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash 337006825, now seen corresponding path program 1 times [2022-01-10 06:19:06,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:06,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034572075] [2022-01-10 06:19:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:06,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:06,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:06,337 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:06,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:19:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:19:06,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:06,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:06,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:06,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034572075] [2022-01-10 06:19:06,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034572075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:06,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:06,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:06,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944444264] [2022-01-10 06:19:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:06,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:06,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:06,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:06,716 INFO L87 Difference]: Start difference. First operand 6956 states and 11286 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 06:19:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:07,012 INFO L93 Difference]: Finished difference Result 13647 states and 22278 transitions. [2022-01-10 06:19:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:07,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 147 [2022-01-10 06:19:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:07,044 INFO L225 Difference]: With dead ends: 13647 [2022-01-10 06:19:07,044 INFO L226 Difference]: Without dead ends: 6956 [2022-01-10 06:19:07,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:19:07,065 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 401 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:07,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2903 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:19:07,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6956 states. [2022-01-10 06:19:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6956 to 6956. [2022-01-10 06:19:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 5249 states have (on average 1.5435321013526386) internal successors, (8102), 5540 states have internal predecessors, (8102), 1304 states have call successors, (1304), 337 states have call predecessors, (1304), 402 states have return successors, (1772), 1280 states have call predecessors, (1772), 1299 states have call successors, (1772) [2022-01-10 06:19:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 11178 transitions. [2022-01-10 06:19:07,319 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 11178 transitions. Word has length 147 [2022-01-10 06:19:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 6956 states and 11178 transitions. [2022-01-10 06:19:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 06:19:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 11178 transitions. [2022-01-10 06:19:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 06:19:07,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:07,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:07,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:07,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:07,533 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1756899461, now seen corresponding path program 1 times [2022-01-10 06:19:07,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:07,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166227425] [2022-01-10 06:19:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:07,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:07,535 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:07,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:19:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:19:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:19:07,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:07,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:07,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166227425] [2022-01-10 06:19:07,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166227425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:07,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:07,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:19:07,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787076835] [2022-01-10 06:19:07,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:19:07,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:19:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:19:07,969 INFO L87 Difference]: Start difference. First operand 6956 states and 11178 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 06:19:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:10,396 INFO L93 Difference]: Finished difference Result 13571 states and 21864 transitions. [2022-01-10 06:19:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:19:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 152 [2022-01-10 06:19:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:10,423 INFO L225 Difference]: With dead ends: 13571 [2022-01-10 06:19:10,424 INFO L226 Difference]: Without dead ends: 7621 [2022-01-10 06:19:10,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:19:10,437 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1908 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:10,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 1964 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2977 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 06:19:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7621 states. [2022-01-10 06:19:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7621 to 7242. [2022-01-10 06:19:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 5459 states have (on average 1.5310496427917202) internal successors, (8358), 5776 states have internal predecessors, (8358), 1324 states have call successors, (1324), 367 states have call predecessors, (1324), 458 states have return successors, (1862), 1300 states have call predecessors, (1862), 1319 states have call successors, (1862) [2022-01-10 06:19:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 11544 transitions. [2022-01-10 06:19:10,659 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 11544 transitions. Word has length 152 [2022-01-10 06:19:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:10,660 INFO L470 AbstractCegarLoop]: Abstraction has 7242 states and 11544 transitions. [2022-01-10 06:19:10,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 06:19:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 11544 transitions. [2022-01-10 06:19:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 06:19:10,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:10,663 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:10,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:10,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:10,874 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash 184740568, now seen corresponding path program 1 times [2022-01-10 06:19:10,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:10,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005036395] [2022-01-10 06:19:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:10,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:10,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:10,876 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:10,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:19:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:11,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:19:11,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:11,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:11,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005036395] [2022-01-10 06:19:11,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005036395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:11,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:11,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:19:11,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626481193] [2022-01-10 06:19:11,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:11,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:19:11,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:11,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:19:11,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:11,350 INFO L87 Difference]: Start difference. First operand 7242 states and 11544 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:19:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:13,687 INFO L93 Difference]: Finished difference Result 25122 states and 41940 transitions. [2022-01-10 06:19:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:19:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) Word has length 157 [2022-01-10 06:19:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:13,796 INFO L225 Difference]: With dead ends: 25122 [2022-01-10 06:19:13,796 INFO L226 Difference]: Without dead ends: 17922 [2022-01-10 06:19:13,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:19:13,832 INFO L933 BasicCegarLoop]: 1478 mSDtfsCounter, 3045 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3171 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:13,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3171 Valid, 2196 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-10 06:19:13,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17922 states. [2022-01-10 06:19:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17922 to 17665. [2022-01-10 06:19:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17665 states, 12719 states have (on average 1.5287365358911864) internal successors, (19444), 13650 states have internal predecessors, (19444), 3968 states have call successors, (3968), 729 states have call predecessors, (3968), 977 states have return successors, (5764), 3964 states have call predecessors, (5764), 3963 states have call successors, (5764) [2022-01-10 06:19:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17665 states to 17665 states and 29176 transitions. [2022-01-10 06:19:14,550 INFO L78 Accepts]: Start accepts. Automaton has 17665 states and 29176 transitions. Word has length 157 [2022-01-10 06:19:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:14,550 INFO L470 AbstractCegarLoop]: Abstraction has 17665 states and 29176 transitions. [2022-01-10 06:19:14,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:19:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17665 states and 29176 transitions. [2022-01-10 06:19:14,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 06:19:14,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:14,554 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:14,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:14,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:14,766 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash 767069203, now seen corresponding path program 1 times [2022-01-10 06:19:14,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:14,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403149691] [2022-01-10 06:19:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:14,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:14,768 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:14,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:19:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:15,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:15,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:19:15,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:15,325 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403149691] [2022-01-10 06:19:15,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403149691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:15,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:15,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:19:15,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511166502] [2022-01-10 06:19:15,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:15,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:19:15,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:19:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:15,327 INFO L87 Difference]: Start difference. First operand 17665 states and 29176 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:19:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:18,989 INFO L93 Difference]: Finished difference Result 65553 states and 114408 transitions. [2022-01-10 06:19:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:19:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) Word has length 158 [2022-01-10 06:19:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:19,303 INFO L225 Difference]: With dead ends: 65553 [2022-01-10 06:19:19,303 INFO L226 Difference]: Without dead ends: 47930 [2022-01-10 06:19:19,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:19:19,416 INFO L933 BasicCegarLoop]: 1480 mSDtfsCounter, 3045 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3170 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:19,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3170 Valid, 2193 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 06:19:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47930 states. [2022-01-10 06:19:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47930 to 47433. [2022-01-10 06:19:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47433 states, 32436 states have (on average 1.5293192748797633) internal successors, (49605), 35305 states have internal predecessors, (49605), 12836 states have call successors, (12836), 1453 states have call predecessors, (12836), 2160 states have return successors, (19662), 13007 states have call predecessors, (19662), 12831 states have call successors, (19662) [2022-01-10 06:19:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47433 states to 47433 states and 82103 transitions. [2022-01-10 06:19:21,892 INFO L78 Accepts]: Start accepts. Automaton has 47433 states and 82103 transitions. Word has length 158 [2022-01-10 06:19:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:21,892 INFO L470 AbstractCegarLoop]: Abstraction has 47433 states and 82103 transitions. [2022-01-10 06:19:21,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:19:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 47433 states and 82103 transitions. [2022-01-10 06:19:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 06:19:21,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:21,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:21,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 06:19:22,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:22,107 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1946065588, now seen corresponding path program 1 times [2022-01-10 06:19:22,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:22,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831510484] [2022-01-10 06:19:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:22,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:22,110 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:22,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process