/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/verifythis/tree_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:40:43,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:40:43,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:40:43,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:40:43,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:40:43,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:40:43,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:40:43,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:40:43,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:40:43,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:40:43,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:40:43,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:40:43,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:40:43,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:40:43,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:40:43,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:40:43,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:40:43,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:40:43,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:40:43,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:40:43,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:40:43,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:40:43,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:40:43,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:40:43,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:40:43,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:40:43,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:40:43,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:40:43,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:40:43,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:40:43,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:40:43,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:40:43,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:40:43,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:40:43,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:40:43,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:40:43,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:40:43,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:40:43,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:40:43,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:40:43,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:40:43,533 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 06:40:43,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:40:43,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:40:43,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:40:43,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:40:43,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:40:43,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:40:43,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:40:43,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:40:43,554 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:40:43,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:40:43,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:40:43,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:40:43,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:40:43,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:43,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:40:43,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:40:43,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:40:43,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:40:43,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:40:43,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:40:43,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:40:43,760 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:40:43,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max.c [2022-01-10 06:40:43,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883a4e388/b277861f68164bd3a0f84d178126ce23/FLAG52459ab26 [2022-01-10 06:40:44,236 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:40:44,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c [2022-01-10 06:40:44,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883a4e388/b277861f68164bd3a0f84d178126ce23/FLAG52459ab26 [2022-01-10 06:40:44,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883a4e388/b277861f68164bd3a0f84d178126ce23 [2022-01-10 06:40:44,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:40:44,261 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:40:44,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:44,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:40:44,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:40:44,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e14336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44, skipping insertion in model container [2022-01-10 06:40:44,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:40:44,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:40:44,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-10 06:40:44,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:44,476 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:40:44,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:40:44,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-10 06:40:44,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:44,499 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:40:44,508 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-10 06:40:44,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:44,523 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:40:44,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44 WrapperNode [2022-01-10 06:40:44,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:44,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:44,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:40:44,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:40:44,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,555 INFO L137 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2022-01-10 06:40:44,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:44,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:40:44,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:40:44,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:40:44,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:40:44,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:40:44,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:40:44,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:40:44,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (1/1) ... [2022-01-10 06:40:44,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:44,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:40:44,607 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 06:40:44,609 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 06:40:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:40:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:40:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 06:40:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 06:40:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 06:40:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-01-10 06:40:44,632 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-01-10 06:40:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-01-10 06:40:44,632 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-01-10 06:40:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-01-10 06:40:44,632 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-01-10 06:40:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 06:40:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:40:44,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:40:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 06:40:44,689 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:40:44,691 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:40:44,822 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:40:44,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:40:44,826 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:40:44,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:44 BoogieIcfgContainer [2022-01-10 06:40:44,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:40:44,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:40:44,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:40:44,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:40:44,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:40:44" (1/3) ... [2022-01-10 06:40:44,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78833724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:44, skipping insertion in model container [2022-01-10 06:40:44,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:44" (2/3) ... [2022-01-10 06:40:44,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78833724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:44, skipping insertion in model container [2022-01-10 06:40:44,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:44" (3/3) ... [2022-01-10 06:40:44,832 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-01-10 06:40:44,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:40:44,835 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:40:44,860 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:40:44,864 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 06:40:44,865 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:40:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 06:40:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 06:40:44,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:44,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:44,878 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:44,881 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2022-01-10 06:40:44,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:44,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221471170] [2022-01-10 06:40:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:44,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:44,891 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 06:40:44,936 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 06:40:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:40:44,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:45,157 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 06:40:45,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:45,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:45,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221471170] [2022-01-10 06:40:45,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221471170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:45,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:45,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:40:45,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188392855] [2022-01-10 06:40:45,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:45,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:40:45,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:40:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:40:45,191 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:40:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:45,300 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-01-10 06:40:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:40:45,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-01-10 06:40:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:45,309 INFO L225 Difference]: With dead ends: 74 [2022-01-10 06:40:45,309 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 06:40:45,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:40:45,316 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:45,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 289 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:40:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 06:40:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 06:40:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 06:40:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-01-10 06:40:45,349 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2022-01-10 06:40:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:45,349 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-01-10 06:40:45,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:40:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-01-10 06:40:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 06:40:45,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:45,352 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 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 06:40:45,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:45,561 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 06:40:45,561 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:45,562 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2022-01-10 06:40:45,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:45,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572599459] [2022-01-10 06:40:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:45,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:45,580 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 06:40:45,582 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 06:40:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:40:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:40:45,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:45,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:45,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572599459] [2022-01-10 06:40:45,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572599459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:45,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:45,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:40:45,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965692900] [2022-01-10 06:40:45,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:45,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:40:45,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:45,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:40:45,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:40:45,786 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:40:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:45,904 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-10 06:40:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:40:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-01-10 06:40:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:45,906 INFO L225 Difference]: With dead ends: 48 [2022-01-10 06:40:45,906 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 06:40:45,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:40:45,907 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:45,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:40:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 06:40:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-10 06:40:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-10 06:40:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-01-10 06:40:45,913 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2022-01-10 06:40:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:45,913 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-01-10 06:40:45,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:40:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-01-10 06:40:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 06:40:45,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:45,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 06:40:45,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 06:40:46,121 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 06:40:46,121 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:46,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2022-01-10 06:40:46,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:46,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486531936] [2022-01-10 06:40:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:46,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:46,124 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 06:40:46,126 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 06:40:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:40:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:46,791 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-10 06:40:46,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 38 [2022-01-10 06:40:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:40:46,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:47,393 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-10 06:40:47,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 1 [2022-01-10 06:40:48,920 INFO L353 Elim1Store]: treesize reduction 193, result has 45.9 percent of original size [2022-01-10 06:40:48,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 64 treesize of output 183 [2022-01-10 06:40:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:40:50,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:50,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486531936] [2022-01-10 06:40:50,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486531936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:50,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:50,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-01-10 06:40:50,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964805172] [2022-01-10 06:40:50,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:50,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:40:50,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:40:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:40:50,902 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 06:40:53,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:40:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:55,221 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2022-01-10 06:40:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:40:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-01-10 06:40:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:55,224 INFO L225 Difference]: With dead ends: 64 [2022-01-10 06:40:55,224 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 06:40:55,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 06:40:55,225 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:55,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 321 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 430 Invalid, 1 Unknown, 40 Unchecked, 3.3s Time] [2022-01-10 06:40:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 06:40:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2022-01-10 06:40:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-10 06:40:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-01-10 06:40:55,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2022-01-10 06:40:55,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:55,232 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-01-10 06:40:55,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 06:40:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-01-10 06:40:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 06:40:55,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:55,234 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:40:55,241 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 06:40:55,441 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 06:40:55,442 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:55,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2022-01-10 06:40:55,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:55,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090532279] [2022-01-10 06:40:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:55,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:55,444 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 06:40:55,445 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 06:40:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 06:40:55,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:55,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-10 06:40:55,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-10 06:40:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:40:56,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:02,463 INFO L353 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-01-10 06:41:02,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-01-10 06:41:02,475 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-01-10 06:41:02,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-01-10 06:41:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:41:02,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:02,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090532279] [2022-01-10 06:41:02,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090532279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:02,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:02,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2022-01-10 06:41:02,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391050727] [2022-01-10 06:41:02,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:02,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:41:02,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:41:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:41:02,519 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:41:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:03,297 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2022-01-10 06:41:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:41:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 47 [2022-01-10 06:41:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:03,299 INFO L225 Difference]: With dead ends: 74 [2022-01-10 06:41:03,300 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 06:41:03,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:41:03,301 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:03,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 296 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-01-10 06:41:03,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 06:41:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-01-10 06:41:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 06:41:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-01-10 06:41:03,308 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 47 [2022-01-10 06:41:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:03,309 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-01-10 06:41:03,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:41:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-01-10 06:41:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 06:41:03,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:03,310 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:41:03,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:41:03,510 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 06:41:03,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:03,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2022-01-10 06:41:03,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:03,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458210119] [2022-01-10 06:41:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:03,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:03,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:03,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:41:03,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:41:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:03,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 06:41:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:03,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:41:03,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:41:04,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-10 06:41:04,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-10 06:41:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:41:04,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:41:04,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:04,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458210119] [2022-01-10 06:41:04,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458210119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:04,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:04,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2022-01-10 06:41:04,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016864273] [2022-01-10 06:41:04,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:04,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:41:04,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:04,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:41:04,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:41:04,631 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:41:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:04,976 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-01-10 06:41:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:41:04,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 47 [2022-01-10 06:41:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:04,978 INFO L225 Difference]: With dead ends: 113 [2022-01-10 06:41:04,978 INFO L226 Difference]: Without dead ends: 94 [2022-01-10 06:41:04,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:41:04,979 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:04,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 308 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-01-10 06:41:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-10 06:41:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-01-10 06:41:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 67 states have internal predecessors, (80), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (29), 16 states have call predecessors, (29), 11 states have call successors, (29) [2022-01-10 06:41:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2022-01-10 06:41:04,989 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 47 [2022-01-10 06:41:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:04,989 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2022-01-10 06:41:04,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:41:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2022-01-10 06:41:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 06:41:04,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:04,991 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:05,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:41:05,198 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 06:41:05,199 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1292352465, now seen corresponding path program 2 times [2022-01-10 06:41:05,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:05,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958803621] [2022-01-10 06:41:05,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:41:05,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:05,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:05,201 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 06:41:05,207 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 06:41:05,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:41:05,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:41:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:41:05,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:05,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:41:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:41:05,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:41:06,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:06,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958803621] [2022-01-10 06:41:06,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958803621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:06,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:06,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2022-01-10 06:41:06,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435058662] [2022-01-10 06:41:06,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:06,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:41:06,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:06,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:41:06,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:41:06,827 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 24 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 10 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (14), 12 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-10 06:41:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:07,801 INFO L93 Difference]: Finished difference Result 167 states and 246 transitions. [2022-01-10 06:41:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:41:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 10 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (14), 12 states have call predecessors, (14), 9 states have call successors, (14) Word has length 57 [2022-01-10 06:41:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:07,803 INFO L225 Difference]: With dead ends: 167 [2022-01-10 06:41:07,803 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 06:41:07,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-10 06:41:07,804 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 33 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:07,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 623 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 0 Unknown, 87 Unchecked, 0.5s Time] [2022-01-10 06:41:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 06:41:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 126. [2022-01-10 06:41:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 92 states have internal predecessors, (114), 19 states have call successors, (19), 11 states have call predecessors, (19), 17 states have return successors, (51), 22 states have call predecessors, (51), 14 states have call successors, (51) [2022-01-10 06:41:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2022-01-10 06:41:07,819 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 57 [2022-01-10 06:41:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:07,819 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2022-01-10 06:41:07,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 10 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (14), 12 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-10 06:41:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2022-01-10 06:41:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 06:41:07,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:07,821 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:07,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:41:08,035 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 06:41:08,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 2 times [2022-01-10 06:41:08,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:08,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614872235] [2022-01-10 06:41:08,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:41:08,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:08,038 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 06:41:08,042 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 06:41:08,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:41:08,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:41:08,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-10 06:41:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:09,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2022-01-10 06:41:09,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 35 [2022-01-10 06:41:10,364 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-10 06:41:10,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 38 [2022-01-10 06:41:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:41:10,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:12,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 112 [2022-01-10 06:41:12,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 64 [2022-01-10 06:41:14,147 INFO L353 Elim1Store]: treesize reduction 301, result has 51.5 percent of original size [2022-01-10 06:41:14,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 112 treesize of output 339 [2022-01-10 06:41:29,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614872235] [2022-01-10 06:41:29,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614872235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [63673176] [2022-01-10 06:41:29,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:41:29,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:41:29,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:41:29,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:41:29,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-01-10 06:41:29,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:41:29,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:41:29,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 06:41:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:30,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:41:30,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:41:30,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-01-10 06:41:30,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-01-10 06:41:32,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-10 06:41:32,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-10 06:41:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 06:41:32,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:34,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [63673176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:34,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:34,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2022-01-10 06:41:34,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322165124] [2022-01-10 06:41:34,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:34,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 06:41:34,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 06:41:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2708, Unknown=5, NotChecked=0, Total=2862 [2022-01-10 06:41:34,947 INFO L87 Difference]: Start difference. First operand 126 states and 184 transitions. Second operand has 35 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 26 states have internal predecessors, (62), 12 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (14), 11 states have call predecessors, (14), 9 states have call successors, (14)