/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec2_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:14:52,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:14:52,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:14:52,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:14:52,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:14:52,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:14:52,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:14:52,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:14:52,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:14:52,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:14:52,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:14:52,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:14:52,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:14:52,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:14:52,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:14:52,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:14:52,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:14:52,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:14:52,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:14:52,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:14:52,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:14:52,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:14:52,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:14:52,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:14:52,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:14:52,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:14:52,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:14:52,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:14:52,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:14:52,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:14:52,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:14:52,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:14:52,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:14:52,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:14:52,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:14:52,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:14:52,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:14:52,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:14:52,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:14:52,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:14:52,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:14:52,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:14:52,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:14:52,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:14:52,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:14:52,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:14:52,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:14:52,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:14:52,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:14:52,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:14:52,896 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:14:52,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:14:52,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:14:52,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:14:52,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:14:52,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:14:52,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:14:52,897 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:14:52,897 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:14:52,898 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:14:52,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:14:52,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:14:52,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:14:52,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:14:52,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:14:52,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:14:52,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:14:52,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:14:52,899 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:14:53,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:14:53,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:14:53,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:14:53,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:14:53,107 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:14:53,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product09.cil.c [2022-01-10 06:14:53,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/455a0189d/fdc02a90b8d04d84952714f0a0d55bce/FLAGce580f49c [2022-01-10 06:14:53,603 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:14:53,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product09.cil.c [2022-01-10 06:14:53,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/455a0189d/fdc02a90b8d04d84952714f0a0d55bce/FLAGce580f49c [2022-01-10 06:14:53,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/455a0189d/fdc02a90b8d04d84952714f0a0d55bce [2022-01-10 06:14:53,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:14:53,902 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:14:53,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:14:53,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:14:53,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:14:53,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:14:53" (1/1) ... [2022-01-10 06:14:53,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d9f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:53, skipping insertion in model container [2022-01-10 06:14:53,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:14:53" (1/1) ... [2022-01-10 06:14:53,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:14:53,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:14:54,225 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_spec2_product09.cil.c[28842,28855] [2022-01-10 06:14:54,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:14:54,344 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:14:54,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:14:54,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-01-10 06:14:54,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:14:54,461 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:14:54,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-01-10 06:14:54,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:14:54,557 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:14:54,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54 WrapperNode [2022-01-10 06:14:54,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:14:54,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:14:54,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:14:54,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:14:54,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,656 INFO L137 Inliner]: procedures = 91, calls = 330, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 771 [2022-01-10 06:14:54,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:14:54,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:14:54,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:14:54,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:14:54,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:14:54,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:14:54,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:14:54,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:14:54,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (1/1) ... [2022-01-10 06:14:54,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:14:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:14:54,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:14:54,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:14:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:14:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-01-10 06:14:54,819 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-01-10 06:14:54,819 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:14:54,819 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:14:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:14:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:14:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:14:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:14:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:14:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:14:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:14:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:14:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-01-10 06:14:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-01-10 06:14:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:14:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:14:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:14:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:14:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:14:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:14:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:14:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:14:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:14:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:14:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:14:54,828 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:14:54,828 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:14:54,828 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:14:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:14:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:14:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:14:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:14:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:14:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:14:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:14:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:14:54,934 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:14:54,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:14:55,734 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:14:55,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:14:55,746 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:14:55,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:14:55 BoogieIcfgContainer [2022-01-10 06:14:55,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:14:55,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:14:55,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:14:55,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:14:55,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:14:53" (1/3) ... [2022-01-10 06:14:55,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348a77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:14:55, skipping insertion in model container [2022-01-10 06:14:55,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:14:54" (2/3) ... [2022-01-10 06:14:55,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348a77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:14:55, skipping insertion in model container [2022-01-10 06:14:55,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:14:55" (3/3) ... [2022-01-10 06:14:55,756 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product09.cil.c [2022-01-10 06:14:55,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:14:55,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:14:55,800 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:14:55,804 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:14:55,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:14:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 526 states, 418 states have (on average 1.7177033492822966) internal successors, (718), 439 states have internal predecessors, (718), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-10 06:14:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:14:55,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:55,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:55,832 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1063489521, now seen corresponding path program 1 times [2022-01-10 06:14:55,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:55,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550758067] [2022-01-10 06:14:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:55,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:55,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:55,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:14:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:14:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:56,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:56,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:56,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550758067] [2022-01-10 06:14:56,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550758067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:56,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:56,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:14:56,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250762646] [2022-01-10 06:14:56,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:56,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:14:56,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:14:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:14:56,236 INFO L87 Difference]: Start difference. First operand has 526 states, 418 states have (on average 1.7177033492822966) internal successors, (718), 439 states have internal predecessors, (718), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:14:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:56,277 INFO L93 Difference]: Finished difference Result 547 states and 920 transitions. [2022-01-10 06:14:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:14:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 74 [2022-01-10 06:14:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:56,291 INFO L225 Difference]: With dead ends: 547 [2022-01-10 06:14:56,292 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 06:14:56,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:14:56,296 INFO L933 BasicCegarLoop]: 881 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, 881 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:56,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 06:14:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-01-10 06:14:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7160194174757282) internal successors, (707), 431 states have internal predecessors, (707), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 874 transitions. [2022-01-10 06:14:56,379 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 874 transitions. Word has length 74 [2022-01-10 06:14:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:56,381 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 874 transitions. [2022-01-10 06:14:56,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:14:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 874 transitions. [2022-01-10 06:14:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:14:56,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:56,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:56,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:14:56,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:56,601 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1607488709, now seen corresponding path program 1 times [2022-01-10 06:14:56,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:56,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342926460] [2022-01-10 06:14:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:56,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:56,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:56,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:56,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:14:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:56,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:56,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:57,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:57,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:57,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342926460] [2022-01-10 06:14:57,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342926460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:57,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:57,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:57,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302727554] [2022-01-10 06:14:57,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:57,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:57,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:57,032 INFO L87 Difference]: Start difference. First operand 518 states and 874 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:57,114 INFO L93 Difference]: Finished difference Result 1018 states and 1724 transitions. [2022-01-10 06:14:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2022-01-10 06:14:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:57,117 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:14:57,118 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 06:14:57,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:57,123 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 14 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:57,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2578 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 06:14:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-01-10 06:14:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7135922330097086) internal successors, (706), 431 states have internal predecessors, (706), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 873 transitions. [2022-01-10 06:14:57,138 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 873 transitions. Word has length 76 [2022-01-10 06:14:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:57,138 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 873 transitions. [2022-01-10 06:14:57,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 873 transitions. [2022-01-10 06:14:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:14:57,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:57,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:57,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:57,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:57,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1678710467, now seen corresponding path program 1 times [2022-01-10 06:14:57,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:57,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590269288] [2022-01-10 06:14:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:57,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:57,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:57,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:57,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:14:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:57,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:57,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:57,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:57,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:57,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590269288] [2022-01-10 06:14:57,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590269288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:57,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:57,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:57,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682016472] [2022-01-10 06:14:57,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:57,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:57,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:57,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:57,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:57,690 INFO L87 Difference]: Start difference. First operand 518 states and 873 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:57,731 INFO L93 Difference]: Finished difference Result 1018 states and 1723 transitions. [2022-01-10 06:14:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-01-10 06:14:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:57,734 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:14:57,734 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 06:14:57,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:57,737 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 12 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:57,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2578 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 06:14:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-01-10 06:14:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 431 states have internal predecessors, (705), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 872 transitions. [2022-01-10 06:14:57,750 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 872 transitions. Word has length 77 [2022-01-10 06:14:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:57,750 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 872 transitions. [2022-01-10 06:14:57,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 872 transitions. [2022-01-10 06:14:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:14:57,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:57,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:57,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:57,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:57,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash -517168127, now seen corresponding path program 1 times [2022-01-10 06:14:57,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:57,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463351824] [2022-01-10 06:14:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:57,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:57,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:57,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:14:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:58,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:58,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:58,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:58,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463351824] [2022-01-10 06:14:58,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463351824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:58,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:58,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:58,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772549464] [2022-01-10 06:14:58,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:58,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:58,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:58,369 INFO L87 Difference]: Start difference. First operand 518 states and 872 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:58,428 INFO L93 Difference]: Finished difference Result 1018 states and 1722 transitions. [2022-01-10 06:14:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:58,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2022-01-10 06:14:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:58,432 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:14:58,432 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 06:14:58,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:58,439 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 10 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:58,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2578 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 06:14:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-01-10 06:14:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7087378640776698) internal successors, (704), 431 states have internal predecessors, (704), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 871 transitions. [2022-01-10 06:14:58,463 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 871 transitions. Word has length 78 [2022-01-10 06:14:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:58,463 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 871 transitions. [2022-01-10 06:14:58,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 871 transitions. [2022-01-10 06:14:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:14:58,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:58,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:58,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:58,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:58,679 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:58,680 INFO L85 PathProgramCache]: Analyzing trace with hash 21286399, now seen corresponding path program 1 times [2022-01-10 06:14:58,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:58,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930683241] [2022-01-10 06:14:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:58,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:58,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:58,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:58,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:14:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:58,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:58,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:58,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:58,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930683241] [2022-01-10 06:14:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930683241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:58,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:58,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:58,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882502745] [2022-01-10 06:14:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:58,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:59,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:59,000 INFO L87 Difference]: Start difference. First operand 518 states and 871 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:59,034 INFO L93 Difference]: Finished difference Result 1018 states and 1721 transitions. [2022-01-10 06:14:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-01-10 06:14:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:59,038 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:14:59,038 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 06:14:59,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:59,040 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 8 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:59,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2578 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 06:14:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-01-10 06:14:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7063106796116505) internal successors, (703), 431 states have internal predecessors, (703), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 870 transitions. [2022-01-10 06:14:59,051 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 870 transitions. Word has length 79 [2022-01-10 06:14:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:59,051 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 870 transitions. [2022-01-10 06:14:59,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,051 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 870 transitions. [2022-01-10 06:14:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 06:14:59,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:59,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:59,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:59,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash -575278275, now seen corresponding path program 1 times [2022-01-10 06:14:59,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:59,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615632052] [2022-01-10 06:14:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:59,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:59,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:59,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:14:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:14:59,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:14:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:14:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:14:59,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:14:59,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:14:59,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615632052] [2022-01-10 06:14:59,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615632052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:14:59,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:14:59,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:14:59,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482471697] [2022-01-10 06:14:59,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:14:59,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:14:59,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:14:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:14:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:14:59,615 INFO L87 Difference]: Start difference. First operand 518 states and 870 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:14:59,645 INFO L93 Difference]: Finished difference Result 1018 states and 1720 transitions. [2022-01-10 06:14:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:14:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-01-10 06:14:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:14:59,648 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:14:59,648 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 06:14:59,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:14:59,650 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 6 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:14:59,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2578 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:14:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 06:14:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-01-10 06:14:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.703883495145631) internal successors, (702), 431 states have internal predecessors, (702), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:14:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 869 transitions. [2022-01-10 06:14:59,661 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 869 transitions. Word has length 80 [2022-01-10 06:14:59,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:14:59,661 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 869 transitions. [2022-01-10 06:14:59,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:14:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 869 transitions. [2022-01-10 06:14:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:14:59,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:14:59,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:14:59,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:14:59,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,874 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:14:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:14:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash 122587418, now seen corresponding path program 1 times [2022-01-10 06:14:59,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:14:59,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143809204] [2022-01-10 06:14:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:14:59,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:14:59,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:14:59,880 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:14:59,881 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 06:15:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:00,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:00,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:00,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:00,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:00,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143809204] [2022-01-10 06:15:00,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143809204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:00,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:00,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:00,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007471569] [2022-01-10 06:15:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:00,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:00,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:00,238 INFO L87 Difference]: Start difference. First operand 518 states and 869 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:00,280 INFO L93 Difference]: Finished difference Result 1018 states and 1719 transitions. [2022-01-10 06:15:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:00,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-01-10 06:15:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:00,283 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:15:00,283 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 06:15:00,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:00,285 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 4 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2578 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 06:15:00,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2578 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 06:15:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-01-10 06:15:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7014563106796117) internal successors, (701), 431 states have internal predecessors, (701), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 868 transitions. [2022-01-10 06:15:00,298 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 868 transitions. Word has length 81 [2022-01-10 06:15:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:00,299 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 868 transitions. [2022-01-10 06:15:00,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 868 transitions. [2022-01-10 06:15:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:15:00,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:00,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:00,325 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 06:15:00,511 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 06:15:00,512 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1997699781, now seen corresponding path program 1 times [2022-01-10 06:15:00,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:00,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122309340] [2022-01-10 06:15:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:00,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:00,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:00,515 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 06:15:00,517 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 06:15:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:00,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:15:00,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:00,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:00,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:00,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122309340] [2022-01-10 06:15:00,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122309340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:00,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:00,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:00,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249976820] [2022-01-10 06:15:00,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:00,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:00,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:00,829 INFO L87 Difference]: Start difference. First operand 518 states and 868 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:00,905 INFO L93 Difference]: Finished difference Result 978 states and 1643 transitions. [2022-01-10 06:15:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-01-10 06:15:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:00,908 INFO L225 Difference]: With dead ends: 978 [2022-01-10 06:15:00,908 INFO L226 Difference]: Without dead ends: 512 [2022-01-10 06:15:00,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:00,910 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 117 mSDsluCounter, 4182 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5037 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:00,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5037 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-10 06:15:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-01-10 06:15:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 406 states have (on average 1.6945812807881773) internal successors, (688), 425 states have internal predecessors, (688), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 855 transitions. [2022-01-10 06:15:00,920 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 855 transitions. Word has length 81 [2022-01-10 06:15:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:00,920 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 855 transitions. [2022-01-10 06:15:00,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 855 transitions. [2022-01-10 06:15:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:15:00,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:00,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:00,938 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 06:15:01,133 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 06:15:01,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash -122849018, now seen corresponding path program 1 times [2022-01-10 06:15:01,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505028886] [2022-01-10 06:15:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:01,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:01,135 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 06:15:01,137 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 06:15:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:01,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:01,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505028886] [2022-01-10 06:15:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505028886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:01,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:01,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:01,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620376204] [2022-01-10 06:15:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:01,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:01,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:01,444 INFO L87 Difference]: Start difference. First operand 512 states and 855 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:01,528 INFO L93 Difference]: Finished difference Result 972 states and 1630 transitions. [2022-01-10 06:15:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-01-10 06:15:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:01,531 INFO L225 Difference]: With dead ends: 972 [2022-01-10 06:15:01,531 INFO L226 Difference]: Without dead ends: 512 [2022-01-10 06:15:01,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:01,533 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 90 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2392 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 06:15:01,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 2392 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-10 06:15:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-01-10 06:15:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 406 states have (on average 1.6847290640394088) internal successors, (684), 425 states have internal predecessors, (684), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 851 transitions. [2022-01-10 06:15:01,549 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 851 transitions. Word has length 82 [2022-01-10 06:15:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:01,549 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 851 transitions. [2022-01-10 06:15:01,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 851 transitions. [2022-01-10 06:15:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:15:01,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:01,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:01,572 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 06:15:01,770 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 06:15:01,770 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 78313982, now seen corresponding path program 1 times [2022-01-10 06:15:01,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932801398] [2022-01-10 06:15:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:01,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:01,772 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 06:15:01,774 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 06:15:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:01,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:01,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:02,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:02,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:02,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932801398] [2022-01-10 06:15:02,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932801398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:02,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:02,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:02,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139627902] [2022-01-10 06:15:02,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:02,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:02,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:02,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:02,101 INFO L87 Difference]: Start difference. First operand 512 states and 851 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:02,189 INFO L93 Difference]: Finished difference Result 972 states and 1626 transitions. [2022-01-10 06:15:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:02,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-01-10 06:15:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:02,206 INFO L225 Difference]: With dead ends: 972 [2022-01-10 06:15:02,206 INFO L226 Difference]: Without dead ends: 512 [2022-01-10 06:15:02,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:02,208 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 85 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2392 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 06:15:02,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2392 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-10 06:15:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-01-10 06:15:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 406 states have (on average 1.6748768472906403) internal successors, (680), 425 states have internal predecessors, (680), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 847 transitions. [2022-01-10 06:15:02,234 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 847 transitions. Word has length 83 [2022-01-10 06:15:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:02,234 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 847 transitions. [2022-01-10 06:15:02,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 847 transitions. [2022-01-10 06:15:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:15:02,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:02,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:02,260 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 06:15:02,447 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 06:15:02,447 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 876725515, now seen corresponding path program 1 times [2022-01-10 06:15:02,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:02,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594418176] [2022-01-10 06:15:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:02,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:02,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:02,449 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 06:15:02,450 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 06:15:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:02,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:02,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:02,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:02,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594418176] [2022-01-10 06:15:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594418176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:02,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:02,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:02,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287980975] [2022-01-10 06:15:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:02,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:02,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:02,780 INFO L87 Difference]: Start difference. First operand 512 states and 847 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:02,868 INFO L93 Difference]: Finished difference Result 972 states and 1622 transitions. [2022-01-10 06:15:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2022-01-10 06:15:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:02,886 INFO L225 Difference]: With dead ends: 972 [2022-01-10 06:15:02,886 INFO L226 Difference]: Without dead ends: 512 [2022-01-10 06:15:02,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:02,888 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 80 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:02,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 2392 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-10 06:15:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-01-10 06:15:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 406 states have (on average 1.6650246305418719) internal successors, (676), 425 states have internal predecessors, (676), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 843 transitions. [2022-01-10 06:15:02,900 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 843 transitions. Word has length 84 [2022-01-10 06:15:02,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:02,901 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 843 transitions. [2022-01-10 06:15:02,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 843 transitions. [2022-01-10 06:15:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:15:02,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:02,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:02,928 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 06:15:03,128 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 06:15:03,128 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1043480971, now seen corresponding path program 1 times [2022-01-10 06:15:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496701884] [2022-01-10 06:15:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:03,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:03,130 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 06:15:03,132 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 06:15:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:03,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:15:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:03,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:03,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:03,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496701884] [2022-01-10 06:15:03,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496701884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:03,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:03,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:03,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360544216] [2022-01-10 06:15:03,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:03,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:03,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:03,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:03,461 INFO L87 Difference]: Start difference. First operand 512 states and 843 transitions. Second operand has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:03,520 INFO L93 Difference]: Finished difference Result 972 states and 1618 transitions. [2022-01-10 06:15:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-01-10 06:15:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:03,524 INFO L225 Difference]: With dead ends: 972 [2022-01-10 06:15:03,524 INFO L226 Difference]: Without dead ends: 491 [2022-01-10 06:15:03,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:03,526 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 110 mSDsluCounter, 4071 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 4902 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 06:15:03,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 4902 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-10 06:15:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2022-01-10 06:15:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 385 states have (on average 1.6675324675324674) internal successors, (642), 404 states have internal predecessors, (642), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 809 transitions. [2022-01-10 06:15:03,536 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 809 transitions. Word has length 84 [2022-01-10 06:15:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:03,536 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 809 transitions. [2022-01-10 06:15:03,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 809 transitions. [2022-01-10 06:15:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 06:15:03,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:03,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:03,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:03,748 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 06:15:03,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1284994909, now seen corresponding path program 1 times [2022-01-10 06:15:03,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:03,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799422253] [2022-01-10 06:15:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:03,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:03,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:03,750 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 06:15:03,752 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 06:15:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:04,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:04,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799422253] [2022-01-10 06:15:04,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799422253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:04,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:04,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:04,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281682980] [2022-01-10 06:15:04,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:04,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:04,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:04,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:04,106 INFO L87 Difference]: Start difference. First operand 491 states and 809 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:04,142 INFO L93 Difference]: Finished difference Result 951 states and 1584 transitions. [2022-01-10 06:15:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-01-10 06:15:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:04,145 INFO L225 Difference]: With dead ends: 951 [2022-01-10 06:15:04,145 INFO L226 Difference]: Without dead ends: 491 [2022-01-10 06:15:04,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:04,147 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 41 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2378 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 06:15:04,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2378 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-10 06:15:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2022-01-10 06:15:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 385 states have (on average 1.664935064935065) internal successors, (641), 404 states have internal predecessors, (641), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 808 transitions. [2022-01-10 06:15:04,156 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 808 transitions. Word has length 85 [2022-01-10 06:15:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:04,156 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 808 transitions. [2022-01-10 06:15:04,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:04,156 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 808 transitions. [2022-01-10 06:15:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 06:15:04,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:04,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:04,180 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 06:15:04,368 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 06:15:04,368 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash -721525488, now seen corresponding path program 1 times [2022-01-10 06:15:04,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:04,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438273451] [2022-01-10 06:15:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:04,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:04,370 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 06:15:04,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:15:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:04,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:04,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:04,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:04,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438273451] [2022-01-10 06:15:04,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438273451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:04,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:04,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:04,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608480063] [2022-01-10 06:15:04,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:04,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:04,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:04,658 INFO L87 Difference]: Start difference. First operand 491 states and 808 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:04,686 INFO L93 Difference]: Finished difference Result 951 states and 1583 transitions. [2022-01-10 06:15:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2022-01-10 06:15:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:04,690 INFO L225 Difference]: With dead ends: 951 [2022-01-10 06:15:04,690 INFO L226 Difference]: Without dead ends: 491 [2022-01-10 06:15:04,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:04,704 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 39 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2378 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 06:15:04,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2378 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-10 06:15:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2022-01-10 06:15:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 385 states have (on average 1.6623376623376624) internal successors, (640), 404 states have internal predecessors, (640), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 807 transitions. [2022-01-10 06:15:04,715 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 807 transitions. Word has length 86 [2022-01-10 06:15:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:04,716 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 807 transitions. [2022-01-10 06:15:04,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 807 transitions. [2022-01-10 06:15:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:15:04,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:04,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:04,727 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 06:15:04,927 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 06:15:04,928 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash -315599542, now seen corresponding path program 1 times [2022-01-10 06:15:04,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:04,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182265311] [2022-01-10 06:15:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:04,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:04,929 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 06:15:04,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:15:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:05,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:05,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:05,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182265311] [2022-01-10 06:15:05,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182265311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:05,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:05,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:05,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568111818] [2022-01-10 06:15:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:05,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:05,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:05,262 INFO L87 Difference]: Start difference. First operand 491 states and 807 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, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:05,296 INFO L93 Difference]: Finished difference Result 951 states and 1582 transitions. [2022-01-10 06:15:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:05,297 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, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-01-10 06:15:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:05,300 INFO L225 Difference]: With dead ends: 951 [2022-01-10 06:15:05,300 INFO L226 Difference]: Without dead ends: 491 [2022-01-10 06:15:05,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:05,302 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 37 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2378 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 06:15:05,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2378 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-10 06:15:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2022-01-10 06:15:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 385 states have (on average 1.6597402597402597) internal successors, (639), 404 states have internal predecessors, (639), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 806 transitions. [2022-01-10 06:15:05,311 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 806 transitions. Word has length 87 [2022-01-10 06:15:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:05,311 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 806 transitions. [2022-01-10 06:15:05,311 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, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:15:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 806 transitions. [2022-01-10 06:15:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:15:05,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:05,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:05,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:05,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:05,522 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1576516792, now seen corresponding path program 1 times [2022-01-10 06:15:05,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627962191] [2022-01-10 06:15:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:05,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:05,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:05,524 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:05,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:15:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:05,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:05,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627962191] [2022-01-10 06:15:05,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627962191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:05,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:05,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:05,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335808710] [2022-01-10 06:15:05,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:05,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:05,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:05,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:05,939 INFO L87 Difference]: Start difference. First operand 491 states and 806 transitions. Second operand has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:06,025 INFO L93 Difference]: Finished difference Result 945 states and 1570 transitions. [2022-01-10 06:15:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:15:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 87 [2022-01-10 06:15:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:06,028 INFO L225 Difference]: With dead ends: 945 [2022-01-10 06:15:06,028 INFO L226 Difference]: Without dead ends: 491 [2022-01-10 06:15:06,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:15:06,030 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 30 mSDsluCounter, 4725 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5516 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:06,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 5516 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-10 06:15:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2022-01-10 06:15:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 385 states have (on average 1.6571428571428573) internal successors, (638), 404 states have internal predecessors, (638), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-10 06:15:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 805 transitions. [2022-01-10 06:15:06,040 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 805 transitions. Word has length 87 [2022-01-10 06:15:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 805 transitions. [2022-01-10 06:15:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 805 transitions. [2022-01-10 06:15:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:15:06,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:06,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:06,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:06,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:06,252 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash 311775717, now seen corresponding path program 1 times [2022-01-10 06:15:06,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:06,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570759845] [2022-01-10 06:15:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:06,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:06,254 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:06,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:15:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:06,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:15:06,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:06,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:06,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570759845] [2022-01-10 06:15:06,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570759845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:06,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:06,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:15:06,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572178421] [2022-01-10 06:15:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:06,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:15:06,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:15:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:15:06,767 INFO L87 Difference]: Start difference. First operand 491 states and 805 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:08,820 INFO L93 Difference]: Finished difference Result 1074 states and 1813 transitions. [2022-01-10 06:15:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:08,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 88 [2022-01-10 06:15:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:08,824 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 06:15:08,824 INFO L226 Difference]: Without dead ends: 628 [2022-01-10 06:15:08,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:15:08,826 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1367 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 3631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:08,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 2785 Invalid, 3631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 3158 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 06:15:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-10 06:15:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 495. [2022-01-10 06:15:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 388 states have (on average 1.652061855670103) internal successors, (641), 407 states have internal predecessors, (641), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (97), 80 states have call predecessors, (97), 81 states have call successors, (97) [2022-01-10 06:15:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 824 transitions. [2022-01-10 06:15:08,851 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 824 transitions. Word has length 88 [2022-01-10 06:15:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:08,851 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 824 transitions. [2022-01-10 06:15:08,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 824 transitions. [2022-01-10 06:15:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:15:08,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:08,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:08,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:15:09,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:09,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1564599194, now seen corresponding path program 1 times [2022-01-10 06:15:09,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:09,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603495211] [2022-01-10 06:15:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:09,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:09,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:09,066 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:09,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:15:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:15:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:09,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:09,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603495211] [2022-01-10 06:15:09,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603495211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:09,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:09,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:09,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343172573] [2022-01-10 06:15:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:09,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:09,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:09,431 INFO L87 Difference]: Start difference. First operand 495 states and 824 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:12,490 INFO L93 Difference]: Finished difference Result 1766 states and 3040 transitions. [2022-01-10 06:15:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:15:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2022-01-10 06:15:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:12,515 INFO L225 Difference]: With dead ends: 1766 [2022-01-10 06:15:12,515 INFO L226 Difference]: Without dead ends: 1316 [2022-01-10 06:15:12,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:15:12,536 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 2215 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2282 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:12,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2282 Valid, 3299 Invalid, 4635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 4011 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 06:15:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-01-10 06:15:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1259. [2022-01-10 06:15:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 984 states have (on average 1.66869918699187) internal successors, (1642), 1032 states have internal predecessors, (1642), 223 states have call successors, (223), 51 states have call predecessors, (223), 51 states have return successors, (238), 212 states have call predecessors, (238), 218 states have call successors, (238) [2022-01-10 06:15:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 2103 transitions. [2022-01-10 06:15:12,652 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 2103 transitions. Word has length 89 [2022-01-10 06:15:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:12,652 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 2103 transitions. [2022-01-10 06:15:12,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 2103 transitions. [2022-01-10 06:15:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 06:15:12,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:12,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:12,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:12,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:12,872 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash 839046955, now seen corresponding path program 1 times [2022-01-10 06:15:12,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:12,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460811072] [2022-01-10 06:15:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:12,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:12,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:12,874 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:12,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:15:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:13,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:15:13,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:13,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:13,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460811072] [2022-01-10 06:15:13,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460811072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:13,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:13,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:13,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534769613] [2022-01-10 06:15:13,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:13,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:13,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:13,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:13,267 INFO L87 Difference]: Start difference. First operand 1259 states and 2103 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:15,868 INFO L93 Difference]: Finished difference Result 3461 states and 5865 transitions. [2022-01-10 06:15:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:15:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 91 [2022-01-10 06:15:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:15,880 INFO L225 Difference]: With dead ends: 3461 [2022-01-10 06:15:15,881 INFO L226 Difference]: Without dead ends: 2558 [2022-01-10 06:15:15,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:15:15,886 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 2536 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2607 SdHoareTripleChecker+Valid, 2372 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:15,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2607 Valid, 2372 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2860 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 06:15:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2022-01-10 06:15:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2352. [2022-01-10 06:15:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 1841 states have (on average 1.6724606192286802) internal successors, (3079), 1931 states have internal predecessors, (3079), 407 states have call successors, (407), 91 states have call predecessors, (407), 103 states have return successors, (481), 391 states have call predecessors, (481), 402 states have call successors, (481) [2022-01-10 06:15:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 3967 transitions. [2022-01-10 06:15:15,977 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 3967 transitions. Word has length 91 [2022-01-10 06:15:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:15,978 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 3967 transitions. [2022-01-10 06:15:15,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:15:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 3967 transitions. [2022-01-10 06:15:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:15:15,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:15,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:16,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:16,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:16,194 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1643733029, now seen corresponding path program 1 times [2022-01-10 06:15:16,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:16,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580064889] [2022-01-10 06:15:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:16,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:16,196 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:16,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:15:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:15:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:16,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:16,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:16,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580064889] [2022-01-10 06:15:16,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580064889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:16,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:16,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:15:16,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251097245] [2022-01-10 06:15:16,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:16,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:15:16,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:15:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:15:16,605 INFO L87 Difference]: Start difference. First operand 2352 states and 3967 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:15:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:19,842 INFO L93 Difference]: Finished difference Result 4863 states and 8218 transitions. [2022-01-10 06:15:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:15:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 96 [2022-01-10 06:15:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:19,855 INFO L225 Difference]: With dead ends: 4863 [2022-01-10 06:15:19,871 INFO L226 Difference]: Without dead ends: 2867 [2022-01-10 06:15:19,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:15:19,879 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 1899 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 4617 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1967 SdHoareTripleChecker+Valid, 3132 SdHoareTripleChecker+Invalid, 5071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 4617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:19,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1967 Valid, 3132 Invalid, 5071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 4617 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 06:15:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-01-10 06:15:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2601. [2022-01-10 06:15:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2022 states have (on average 1.6454005934718101) internal successors, (3327), 2127 states have internal predecessors, (3327), 449 states have call successors, (449), 111 states have call predecessors, (449), 129 states have return successors, (562), 424 states have call predecessors, (562), 444 states have call successors, (562) [2022-01-10 06:15:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 4338 transitions. [2022-01-10 06:15:19,970 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 4338 transitions. Word has length 96 [2022-01-10 06:15:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:19,970 INFO L470 AbstractCegarLoop]: Abstraction has 2601 states and 4338 transitions. [2022-01-10 06:15:19,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:15:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 4338 transitions. [2022-01-10 06:15:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:15:19,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:19,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:19,985 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 06:15:20,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,183 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1757746257, now seen corresponding path program 1 times [2022-01-10 06:15:20,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:20,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050324221] [2022-01-10 06:15:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:20,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:20,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:15:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:20,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:15:20,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:20,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050324221] [2022-01-10 06:15:20,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050324221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:20,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:20,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:20,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937278342] [2022-01-10 06:15:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:20,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:20,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:20,522 INFO L87 Difference]: Start difference. First operand 2601 states and 4338 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:15:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:20,647 INFO L93 Difference]: Finished difference Result 5118 states and 8637 transitions. [2022-01-10 06:15:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-01-10 06:15:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:20,657 INFO L225 Difference]: With dead ends: 5118 [2022-01-10 06:15:20,658 INFO L226 Difference]: Without dead ends: 2601 [2022-01-10 06:15:20,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:20,665 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 234 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:20,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 2257 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2022-01-10 06:15:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2601. [2022-01-10 06:15:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2022 states have (on average 1.6186943620178043) internal successors, (3273), 2127 states have internal predecessors, (3273), 449 states have call successors, (449), 111 states have call predecessors, (449), 129 states have return successors, (562), 424 states have call predecessors, (562), 444 states have call successors, (562) [2022-01-10 06:15:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 4284 transitions. [2022-01-10 06:15:20,741 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 4284 transitions. Word has length 103 [2022-01-10 06:15:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:20,741 INFO L470 AbstractCegarLoop]: Abstraction has 2601 states and 4284 transitions. [2022-01-10 06:15:20,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:15:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 4284 transitions. [2022-01-10 06:15:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:15:20,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:20,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:20,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:20,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,954 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:20,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:20,954 INFO L85 PathProgramCache]: Analyzing trace with hash -179301962, now seen corresponding path program 1 times [2022-01-10 06:15:20,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:20,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557594341] [2022-01-10 06:15:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:20,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:20,956 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:20,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:15:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:15:21,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:21,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557594341] [2022-01-10 06:15:21,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557594341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:21,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:21,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:21,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986378044] [2022-01-10 06:15:21,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:21,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:21,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:21,357 INFO L87 Difference]: Start difference. First operand 2601 states and 4284 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:15:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:23,098 INFO L93 Difference]: Finished difference Result 5122 states and 8470 transitions. [2022-01-10 06:15:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:15:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2022-01-10 06:15:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:23,124 INFO L225 Difference]: With dead ends: 5122 [2022-01-10 06:15:23,124 INFO L226 Difference]: Without dead ends: 2934 [2022-01-10 06:15:23,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:15:23,132 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 1968 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 2855 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:23,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2042 Valid, 2112 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2855 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 06:15:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2022-01-10 06:15:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2718. [2022-01-10 06:15:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2108 states have (on average 1.6010436432637571) internal successors, (3375), 2224 states have internal predecessors, (3375), 457 states have call successors, (457), 124 states have call predecessors, (457), 152 states have return successors, (607), 432 states have call predecessors, (607), 452 states have call successors, (607) [2022-01-10 06:15:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4439 transitions. [2022-01-10 06:15:23,224 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4439 transitions. Word has length 108 [2022-01-10 06:15:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:23,224 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 4439 transitions. [2022-01-10 06:15:23,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:15:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4439 transitions. [2022-01-10 06:15:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:15:23,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:23,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:23,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:23,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:23,438 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 360327549, now seen corresponding path program 1 times [2022-01-10 06:15:23,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:23,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292127412] [2022-01-10 06:15:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:23,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:23,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:23,440 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:23,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:15:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:23,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:15:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:15:23,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:23,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:23,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292127412] [2022-01-10 06:15:23,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292127412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:23,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:23,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:23,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318383828] [2022-01-10 06:15:23,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:23,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:23,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:23,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:23,986 INFO L87 Difference]: Start difference. First operand 2718 states and 4439 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:26,718 INFO L93 Difference]: Finished difference Result 5283 states and 8649 transitions. [2022-01-10 06:15:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:15:26,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-01-10 06:15:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:26,737 INFO L225 Difference]: With dead ends: 5283 [2022-01-10 06:15:26,737 INFO L226 Difference]: Without dead ends: 2977 [2022-01-10 06:15:26,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:15:26,744 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1555 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 3689 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 2589 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:26,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 2589 Invalid, 4050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3689 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 06:15:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2022-01-10 06:15:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2686. [2022-01-10 06:15:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2084 states have (on average 1.5993282149712091) internal successors, (3333), 2197 states have internal predecessors, (3333), 452 states have call successors, (452), 124 states have call predecessors, (452), 149 states have return successors, (582), 427 states have call predecessors, (582), 447 states have call successors, (582) [2022-01-10 06:15:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 4367 transitions. [2022-01-10 06:15:26,832 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 4367 transitions. Word has length 113 [2022-01-10 06:15:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:26,832 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 4367 transitions. [2022-01-10 06:15:26,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 4367 transitions. [2022-01-10 06:15:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:15:26,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:26,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:26,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:27,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:27,045 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash 226314043, now seen corresponding path program 1 times [2022-01-10 06:15:27,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:27,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993291348] [2022-01-10 06:15:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:27,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:27,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:27,050 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:27,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:15:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:15:27,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:15:27,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:27,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:27,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993291348] [2022-01-10 06:15:27,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993291348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:27,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:27,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:27,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137739965] [2022-01-10 06:15:27,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:27,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:27,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:27,504 INFO L87 Difference]: Start difference. First operand 2686 states and 4367 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:29,693 INFO L93 Difference]: Finished difference Result 5959 states and 9790 transitions. [2022-01-10 06:15:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:15:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-01-10 06:15:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:29,716 INFO L225 Difference]: With dead ends: 5959 [2022-01-10 06:15:29,716 INFO L226 Difference]: Without dead ends: 3681 [2022-01-10 06:15:29,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:15:29,725 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 1700 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:29,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1775 Valid, 1887 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 06:15:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2022-01-10 06:15:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3492. [2022-01-10 06:15:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 2703 states have (on average 1.6008139104698482) internal successors, (4327), 2852 states have internal predecessors, (4327), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 5706 transitions. [2022-01-10 06:15:29,826 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 5706 transitions. Word has length 113 [2022-01-10 06:15:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:29,858 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 5706 transitions. [2022-01-10 06:15:29,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:15:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 5706 transitions. [2022-01-10 06:15:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:15:29,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:29,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:29,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 06:15:30,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:30,071 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:30,072 INFO L85 PathProgramCache]: Analyzing trace with hash 757531011, now seen corresponding path program 1 times [2022-01-10 06:15:30,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:30,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622743875] [2022-01-10 06:15:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:30,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:30,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:30,073 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:30,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:15:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:15:30,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:30,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622743875] [2022-01-10 06:15:30,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622743875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:30,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:30,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:30,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681905586] [2022-01-10 06:15:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:30,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:30,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:30,511 INFO L87 Difference]: Start difference. First operand 3492 states and 5706 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:15:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:30,899 INFO L93 Difference]: Finished difference Result 3575 states and 5841 transitions. [2022-01-10 06:15:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:15:30,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2022-01-10 06:15:30,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:30,913 INFO L225 Difference]: With dead ends: 3575 [2022-01-10 06:15:30,913 INFO L226 Difference]: Without dead ends: 3560 [2022-01-10 06:15:30,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:30,916 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 733 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:30,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 2034 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:15:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2022-01-10 06:15:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 3498. [2022-01-10 06:15:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 2709 states have (on average 1.599483204134367) internal successors, (4333), 2858 states have internal predecessors, (4333), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5712 transitions. [2022-01-10 06:15:31,006 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5712 transitions. Word has length 114 [2022-01-10 06:15:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:31,006 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 5712 transitions. [2022-01-10 06:15:31,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:15:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5712 transitions. [2022-01-10 06:15:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 06:15:31,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:31,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:31,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:31,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:31,219 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:31,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1035396738, now seen corresponding path program 1 times [2022-01-10 06:15:31,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358763811] [2022-01-10 06:15:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:31,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:31,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:31,221 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:31,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:15:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:31,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:15:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:15:31,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:31,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:31,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358763811] [2022-01-10 06:15:31,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358763811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:31,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:31,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:15:31,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853507368] [2022-01-10 06:15:31,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:31,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:31,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:31,615 INFO L87 Difference]: Start difference. First operand 3498 states and 5712 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:15:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:31,686 INFO L93 Difference]: Finished difference Result 3517 states and 5736 transitions. [2022-01-10 06:15:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 120 [2022-01-10 06:15:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:31,699 INFO L225 Difference]: With dead ends: 3517 [2022-01-10 06:15:31,699 INFO L226 Difference]: Without dead ends: 3502 [2022-01-10 06:15:31,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:15:31,702 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 37 mSDsluCounter, 2343 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3140 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:31,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3140 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-01-10 06:15:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3498. [2022-01-10 06:15:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 2709 states have (on average 1.5980066445182723) internal successors, (4329), 2858 states have internal predecessors, (4329), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5708 transitions. [2022-01-10 06:15:31,798 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5708 transitions. Word has length 120 [2022-01-10 06:15:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:31,799 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 5708 transitions. [2022-01-10 06:15:31,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:15:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5708 transitions. [2022-01-10 06:15:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:15:31,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:31,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:31,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:32,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:32,012 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1771185064, now seen corresponding path program 1 times [2022-01-10 06:15:32,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:32,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996670199] [2022-01-10 06:15:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:32,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:32,014 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:32,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:15:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:15:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:15:32,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:32,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:32,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996670199] [2022-01-10 06:15:32,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996670199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:32,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:32,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:32,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857799320] [2022-01-10 06:15:32,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:32,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:32,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:32,499 INFO L87 Difference]: Start difference. First operand 3498 states and 5708 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:33,843 INFO L93 Difference]: Finished difference Result 6967 states and 11421 transitions. [2022-01-10 06:15:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:33,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2022-01-10 06:15:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:33,888 INFO L225 Difference]: With dead ends: 6967 [2022-01-10 06:15:33,888 INFO L226 Difference]: Without dead ends: 3522 [2022-01-10 06:15:33,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:15:33,898 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 1190 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 2451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:33,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 1907 Invalid, 2451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 06:15:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2022-01-10 06:15:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 3498. [2022-01-10 06:15:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 2709 states have (on average 1.596530084902178) internal successors, (4325), 2858 states have internal predecessors, (4325), 602 states have call successors, (602), 165 states have call predecessors, (602), 186 states have return successors, (777), 560 states have call predecessors, (777), 597 states have call successors, (777) [2022-01-10 06:15:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5704 transitions. [2022-01-10 06:15:34,054 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5704 transitions. Word has length 131 [2022-01-10 06:15:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:34,054 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 5704 transitions. [2022-01-10 06:15:34,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5704 transitions. [2022-01-10 06:15:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 06:15:34,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:34,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:34,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:34,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:34,268 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash -279140526, now seen corresponding path program 1 times [2022-01-10 06:15:34,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:34,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107081611] [2022-01-10 06:15:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:34,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:34,270 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:15:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:34,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:15:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:15:34,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:34,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107081611] [2022-01-10 06:15:34,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107081611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:34,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:34,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:15:34,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062507045] [2022-01-10 06:15:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:34,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:34,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:34,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:34,679 INFO L87 Difference]: Start difference. First operand 3498 states and 5704 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:36,540 INFO L93 Difference]: Finished difference Result 12494 states and 20773 transitions. [2022-01-10 06:15:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:36,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 132 [2022-01-10 06:15:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:36,580 INFO L225 Difference]: With dead ends: 12494 [2022-01-10 06:15:36,581 INFO L226 Difference]: Without dead ends: 9049 [2022-01-10 06:15:36,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:15:36,594 INFO L933 BasicCegarLoop]: 1068 mSDtfsCounter, 2063 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:36,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2181 Valid, 1895 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 06:15:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9049 states. [2022-01-10 06:15:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9049 to 8427. [2022-01-10 06:15:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8427 states, 6350 states have (on average 1.5870866141732283) internal successors, (10078), 6758 states have internal predecessors, (10078), 1633 states have call successors, (1633), 358 states have call predecessors, (1633), 443 states have return successors, (2263), 1550 states have call predecessors, (2263), 1628 states have call successors, (2263) [2022-01-10 06:15:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8427 states to 8427 states and 13974 transitions. [2022-01-10 06:15:36,943 INFO L78 Accepts]: Start accepts. Automaton has 8427 states and 13974 transitions. Word has length 132 [2022-01-10 06:15:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:36,943 INFO L470 AbstractCegarLoop]: Abstraction has 8427 states and 13974 transitions. [2022-01-10 06:15:36,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:15:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8427 states and 13974 transitions. [2022-01-10 06:15:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 06:15:36,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:36,947 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:36,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:37,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:37,158 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2011044290, now seen corresponding path program 1 times [2022-01-10 06:15:37,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:37,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363344214] [2022-01-10 06:15:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:37,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:37,160 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:37,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:15:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:37,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:15:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:15:37,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:37,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:37,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363344214] [2022-01-10 06:15:37,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363344214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:37,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:37,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:15:37,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433410898] [2022-01-10 06:15:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:37,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:37,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:37,600 INFO L87 Difference]: Start difference. First operand 8427 states and 13974 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-01-10 06:15:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:38,027 INFO L93 Difference]: Finished difference Result 8592 states and 14218 transitions. [2022-01-10 06:15:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:38,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2022-01-10 06:15:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:38,104 INFO L225 Difference]: With dead ends: 8592 [2022-01-10 06:15:38,104 INFO L226 Difference]: Without dead ends: 8577 [2022-01-10 06:15:38,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:38,143 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 66 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:38,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 3271 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8577 states. [2022-01-10 06:15:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8577 to 8439. [2022-01-10 06:15:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 6362 states have (on average 1.5853505187048098) internal successors, (10086), 6770 states have internal predecessors, (10086), 1633 states have call successors, (1633), 358 states have call predecessors, (1633), 443 states have return successors, (2263), 1550 states have call predecessors, (2263), 1628 states have call successors, (2263) [2022-01-10 06:15:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 13982 transitions. [2022-01-10 06:15:38,476 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 13982 transitions. Word has length 140 [2022-01-10 06:15:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:38,476 INFO L470 AbstractCegarLoop]: Abstraction has 8439 states and 13982 transitions. [2022-01-10 06:15:38,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-01-10 06:15:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 13982 transitions. [2022-01-10 06:15:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 06:15:38,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:38,480 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:38,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:38,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:38,691 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:38,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1328034440, now seen corresponding path program 1 times [2022-01-10 06:15:38,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:38,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460508738] [2022-01-10 06:15:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:38,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:38,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:38,693 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:38,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:15:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:15:38,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-10 06:15:39,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:15:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-10 06:15:39,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460508738] [2022-01-10 06:15:39,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460508738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:15:39,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:15:39,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-01-10 06:15:39,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428308850] [2022-01-10 06:15:39,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:15:39,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:15:39,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:15:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:15:39,557 INFO L87 Difference]: Start difference. First operand 8439 states and 13982 transitions. Second operand has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 13 states have internal predecessors, (170), 8 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2022-01-10 06:15:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:43,495 INFO L93 Difference]: Finished difference Result 27834 states and 46733 transitions. [2022-01-10 06:15:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:15:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 13 states have internal predecessors, (170), 8 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) Word has length 168 [2022-01-10 06:15:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:43,598 INFO L225 Difference]: With dead ends: 27834 [2022-01-10 06:15:43,599 INFO L226 Difference]: Without dead ends: 19452 [2022-01-10 06:15:43,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:15:43,630 INFO L933 BasicCegarLoop]: 1478 mSDtfsCounter, 4452 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 6219 mSolverCounterSat, 1282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4564 SdHoareTripleChecker+Valid, 5266 SdHoareTripleChecker+Invalid, 7501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 6219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:43,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4564 Valid, 5266 Invalid, 7501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1282 Valid, 6219 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 06:15:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19452 states. [2022-01-10 06:15:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19452 to 19025. [2022-01-10 06:15:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19025 states, 13989 states have (on average 1.5774537136321396) internal successors, (22067), 14934 states have internal predecessors, (22067), 4100 states have call successors, (4100), 712 states have call predecessors, (4100), 935 states have return successors, (5846), 3978 states have call predecessors, (5846), 4095 states have call successors, (5846) [2022-01-10 06:15:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19025 states to 19025 states and 32013 transitions. [2022-01-10 06:15:44,662 INFO L78 Accepts]: Start accepts. Automaton has 19025 states and 32013 transitions. Word has length 168 [2022-01-10 06:15:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:44,663 INFO L470 AbstractCegarLoop]: Abstraction has 19025 states and 32013 transitions. [2022-01-10 06:15:44,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 13 states have internal predecessors, (170), 8 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2022-01-10 06:15:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19025 states and 32013 transitions. [2022-01-10 06:15:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 06:15:44,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:44,673 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:44,686 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 06:15:44,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:44,885 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash -391073913, now seen corresponding path program 1 times [2022-01-10 06:15:44,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:44,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697170754] [2022-01-10 06:15:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:44,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:44,887 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:44,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:15:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:45,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:15:45,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:45,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:45,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697170754] [2022-01-10 06:15:45,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697170754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:45,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:45,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:45,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109465920] [2022-01-10 06:15:45,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:45,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:45,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:45,327 INFO L87 Difference]: Start difference. First operand 19025 states and 32013 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:15:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:46,329 INFO L93 Difference]: Finished difference Result 38161 states and 64600 transitions. [2022-01-10 06:15:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:15:46,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 169 [2022-01-10 06:15:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:46,426 INFO L225 Difference]: With dead ends: 38161 [2022-01-10 06:15:46,426 INFO L226 Difference]: Without dead ends: 19213 [2022-01-10 06:15:46,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:46,623 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 18 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:46,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2266 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19213 states. [2022-01-10 06:15:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19213 to 19211. [2022-01-10 06:15:47,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19211 states, 14145 states have (on average 1.5693884764934607) internal successors, (22199), 15074 states have internal predecessors, (22199), 4088 states have call successors, (4088), 778 states have call predecessors, (4088), 977 states have return successors, (5730), 3958 states have call predecessors, (5730), 4083 states have call successors, (5730) [2022-01-10 06:15:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19211 states to 19211 states and 32017 transitions. [2022-01-10 06:15:47,334 INFO L78 Accepts]: Start accepts. Automaton has 19211 states and 32017 transitions. Word has length 169 [2022-01-10 06:15:47,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:47,334 INFO L470 AbstractCegarLoop]: Abstraction has 19211 states and 32017 transitions. [2022-01-10 06:15:47,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:15:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 19211 states and 32017 transitions. [2022-01-10 06:15:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 06:15:47,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:47,344 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:47,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:47,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:47,555 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -55147069, now seen corresponding path program 1 times [2022-01-10 06:15:47,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:47,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593233125] [2022-01-10 06:15:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:47,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:47,557 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:47,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:15:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 06:15:48,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:48,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:48,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593233125] [2022-01-10 06:15:48,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593233125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:48,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:48,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:48,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114047913] [2022-01-10 06:15:48,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:48,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:48,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:48,053 INFO L87 Difference]: Start difference. First operand 19211 states and 32017 transitions. Second operand has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:15:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:48,753 INFO L93 Difference]: Finished difference Result 27528 states and 45708 transitions. [2022-01-10 06:15:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:15:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 172 [2022-01-10 06:15:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:48,852 INFO L225 Difference]: With dead ends: 27528 [2022-01-10 06:15:48,853 INFO L226 Difference]: Without dead ends: 18982 [2022-01-10 06:15:49,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:15:49,007 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 28 mSDsluCounter, 4659 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 5440 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:49,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 5440 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18982 states. [2022-01-10 06:15:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18982 to 18982. [2022-01-10 06:15:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18982 states, 13961 states have (on average 1.5734546235942983) internal successors, (21967), 14891 states have internal predecessors, (21967), 4046 states have call successors, (4046), 777 states have call predecessors, (4046), 974 states have return successors, (5630), 3913 states have call predecessors, (5630), 4041 states have call successors, (5630) [2022-01-10 06:15:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18982 states to 18982 states and 31643 transitions. [2022-01-10 06:15:49,842 INFO L78 Accepts]: Start accepts. Automaton has 18982 states and 31643 transitions. Word has length 172 [2022-01-10 06:15:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:49,842 INFO L470 AbstractCegarLoop]: Abstraction has 18982 states and 31643 transitions. [2022-01-10 06:15:49,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:15:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 18982 states and 31643 transitions. [2022-01-10 06:15:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 06:15:49,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:49,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:49,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:50,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:50,067 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash 435093580, now seen corresponding path program 1 times [2022-01-10 06:15:50,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:50,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009025926] [2022-01-10 06:15:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:50,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:50,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:50,070 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:50,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:15:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:50,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 06:15:50,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:50,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:50,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009025926] [2022-01-10 06:15:50,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009025926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:50,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:50,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:50,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563312027] [2022-01-10 06:15:50,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:50,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:50,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:50,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:50,623 INFO L87 Difference]: Start difference. First operand 18982 states and 31643 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:15:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:51,837 INFO L93 Difference]: Finished difference Result 42892 states and 72624 transitions. [2022-01-10 06:15:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:51,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 195 [2022-01-10 06:15:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:52,027 INFO L225 Difference]: With dead ends: 42892 [2022-01-10 06:15:52,027 INFO L226 Difference]: Without dead ends: 25889 [2022-01-10 06:15:52,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:52,076 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 215 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:52,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2587 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2022-01-10 06:15:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 19038. [2022-01-10 06:15:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19038 states, 14017 states have (on average 1.5711635870728402) internal successors, (22023), 14947 states have internal predecessors, (22023), 4046 states have call successors, (4046), 777 states have call predecessors, (4046), 974 states have return successors, (5630), 3913 states have call predecessors, (5630), 4041 states have call successors, (5630) [2022-01-10 06:15:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19038 states to 19038 states and 31699 transitions. [2022-01-10 06:15:53,101 INFO L78 Accepts]: Start accepts. Automaton has 19038 states and 31699 transitions. Word has length 195 [2022-01-10 06:15:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:53,102 INFO L470 AbstractCegarLoop]: Abstraction has 19038 states and 31699 transitions. [2022-01-10 06:15:53,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:15:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 19038 states and 31699 transitions. [2022-01-10 06:15:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-10 06:15:53,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:53,111 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:53,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 06:15:53,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:53,323 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1248927525, now seen corresponding path program 1 times [2022-01-10 06:15:53,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:53,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617065282] [2022-01-10 06:15:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:53,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:53,325 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:15:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:15:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 06:15:53,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:15:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-10 06:15:54,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:54,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617065282] [2022-01-10 06:15:54,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617065282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:15:54,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:15:54,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2022-01-10 06:15:54,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120088518] [2022-01-10 06:15:54,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:15:54,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:15:54,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:15:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:15:54,825 INFO L87 Difference]: Start difference. First operand 19038 states and 31699 transitions. Second operand has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 10 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34) [2022-01-10 06:16:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:02,107 INFO L93 Difference]: Finished difference Result 53288 states and 89136 transitions. [2022-01-10 06:16:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 06:16:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 10 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34) Word has length 197 [2022-01-10 06:16:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:02,291 INFO L225 Difference]: With dead ends: 53288 [2022-01-10 06:16:02,291 INFO L226 Difference]: Without dead ends: 36433 [2022-01-10 06:16:02,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 392 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=389, Invalid=1417, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 06:16:02,371 INFO L933 BasicCegarLoop]: 1238 mSDtfsCounter, 7399 mSDsluCounter, 2593 mSDsCounter, 0 mSdLazyCounter, 7360 mSolverCounterSat, 2141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7471 SdHoareTripleChecker+Valid, 3831 SdHoareTripleChecker+Invalid, 9501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2141 IncrementalHoareTripleChecker+Valid, 7360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:02,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7471 Valid, 3831 Invalid, 9501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2141 Valid, 7360 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-01-10 06:16:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36433 states. [2022-01-10 06:16:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36433 to 35789. [2022-01-10 06:16:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35789 states, 26371 states have (on average 1.5615638390656403) internal successors, (41180), 27996 states have internal predecessors, (41180), 7505 states have call successors, (7505), 1542 states have call predecessors, (7505), 1912 states have return successors, (10843), 7334 states have call predecessors, (10843), 7500 states have call successors, (10843) [2022-01-10 06:16:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35789 states to 35789 states and 59528 transitions. [2022-01-10 06:16:04,216 INFO L78 Accepts]: Start accepts. Automaton has 35789 states and 59528 transitions. Word has length 197 [2022-01-10 06:16:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:04,217 INFO L470 AbstractCegarLoop]: Abstraction has 35789 states and 59528 transitions. [2022-01-10 06:16:04,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 10 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34) [2022-01-10 06:16:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 35789 states and 59528 transitions. [2022-01-10 06:16:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 06:16:04,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:04,223 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:16:04,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 06:16:04,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:04,428 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1937779695, now seen corresponding path program 1 times [2022-01-10 06:16:04,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698898519] [2022-01-10 06:16:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:04,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:04,430 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:04,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process