/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 14:36:07,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 14:36:07,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 14:36:08,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 14:36:08,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 14:36:08,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 14:36:08,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 14:36:08,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 14:36:08,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 14:36:08,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 14:36:08,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 14:36:08,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 14:36:08,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 14:36:08,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 14:36:08,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 14:36:08,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 14:36:08,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 14:36:08,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 14:36:08,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 14:36:08,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 14:36:08,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 14:36:08,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 14:36:08,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 14:36:08,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 14:36:08,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 14:36:08,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 14:36:08,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 14:36:08,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 14:36:08,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 14:36:08,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 14:36:08,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 14:36:08,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 14:36:08,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 14:36:08,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 14:36:08,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 14:36:08,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 14:36:08,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 14:36:08,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 14:36:08,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 14:36:08,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 14:36:08,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 14:36:08,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 14:36:08,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 14:36:08,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 14:36:08,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 14:36:08,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 14:36:08,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 14:36:08,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 14:36:08,093 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 14:36:08,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 14:36:08,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 14:36:08,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 14:36:08,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 14:36:08,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 14:36:08,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 14:36:08,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 14:36:08,095 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 14:36:08,095 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 14:36:08,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 14:36:08,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 14:36:08,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 14:36:08,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 14:36:08,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 14:36:08,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:36:08,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 14:36:08,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 14:36:08,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 14:36:08,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 14:36:08,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 14:36:08,097 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 14:36:08,097 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 14:36:08,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 14:36:08,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 14:36:08,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 14:36:08,098 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 14:36:08,098 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 14:36:08,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 14:36:08,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 14:36:08,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 14:36:08,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 14:36:08,310 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 14:36:08,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-01-10 14:36:08,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fe7d2046/7c857e1ea4a749be922116a1f39c0fdd/FLAG0c118d661 [2022-01-10 14:36:08,675 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 14:36:08,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-01-10 14:36:08,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fe7d2046/7c857e1ea4a749be922116a1f39c0fdd/FLAG0c118d661 [2022-01-10 14:36:09,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fe7d2046/7c857e1ea4a749be922116a1f39c0fdd [2022-01-10 14:36:09,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 14:36:09,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 14:36:09,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 14:36:09,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 14:36:09,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 14:36:09,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67be7955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09, skipping insertion in model container [2022-01-10 14:36:09,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 14:36:09,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:36:09,341 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_del_iter_incorrect.c[619,632] [2022-01-10 14:36:09,378 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 14:36:09,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:36:09,408 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 14:36:09,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:36:09,423 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_del_iter_incorrect.c[619,632] [2022-01-10 14:36:09,436 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 14:36:09,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:36:09,448 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 14:36:09,458 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_del_iter_incorrect.c[619,632] [2022-01-10 14:36:09,478 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 14:36:09,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:36:09,493 INFO L208 MainTranslator]: Completed translation [2022-01-10 14:36:09,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09 WrapperNode [2022-01-10 14:36:09,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 14:36:09,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 14:36:09,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 14:36:09,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 14:36:09,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,541 INFO L137 Inliner]: procedures = 31, calls = 61, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 131 [2022-01-10 14:36:09,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 14:36:09,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 14:36:09,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 14:36:09,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 14:36:09,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 14:36:09,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 14:36:09,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 14:36:09,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 14:36:09,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (1/1) ... [2022-01-10 14:36:09,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:36:09,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:36:09,632 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 14:36:09,678 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 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-01-10 14:36:09,698 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-01-10 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 14:36:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-01-10 14:36:09,699 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-01-10 14:36:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 14:36:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-01-10 14:36:09,699 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-01-10 14:36:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 14:36:09,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 14:36:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-01-10 14:36:09,699 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-01-10 14:36:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 14:36:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 14:36:09,794 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 14:36:09,795 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 14:36:10,136 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 14:36:10,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 14:36:10,145 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 14:36:10,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:36:10 BoogieIcfgContainer [2022-01-10 14:36:10,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 14:36:10,150 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 14:36:10,150 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 14:36:10,159 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 14:36:10,162 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:36:10" (1/1) ... [2022-01-10 14:36:10,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:36:10 BasicIcfg [2022-01-10 14:36:10,287 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 14:36:10,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 14:36:10,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 14:36:10,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 14:36:10,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:36:09" (1/4) ... [2022-01-10 14:36:10,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e598706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:36:10, skipping insertion in model container [2022-01-10 14:36:10,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:36:09" (2/4) ... [2022-01-10 14:36:10,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e598706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:36:10, skipping insertion in model container [2022-01-10 14:36:10,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:36:10" (3/4) ... [2022-01-10 14:36:10,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e598706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:36:10, skipping insertion in model container [2022-01-10 14:36:10,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:36:10" (4/4) ... [2022-01-10 14:36:10,292 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.cTransformedIcfg [2022-01-10 14:36:10,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 14:36:10,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-01-10 14:36:10,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 14:36:10,329 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 14:36:10,329 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-10 14:36:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 57 states have (on average 1.368421052631579) internal successors, (78), 61 states have internal predecessors, (78), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 14:36:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 14:36:10,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:36:10,346 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] [2022-01-10 14:36:10,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-01-10 14:36:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:36:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 13657031, now seen corresponding path program 1 times [2022-01-10 14:36:10,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:36:10,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732521475] [2022-01-10 14:36:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:10,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:36:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:10,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-10 14:36:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:10,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 14:36:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 14:36:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:10,710 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 14:36:10,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:36:10,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732521475] [2022-01-10 14:36:10,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732521475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:36:10,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:36:10,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 14:36:10,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144959274] [2022-01-10 14:36:10,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:36:10,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 14:36:10,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:36:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 14:36:10,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 14:36:10,736 INFO L87 Difference]: Start difference. First operand has 80 states, 57 states have (on average 1.368421052631579) internal successors, (78), 61 states have internal predecessors, (78), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 14:36:12,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 14:36:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:36:13,268 INFO L93 Difference]: Finished difference Result 144 states and 196 transitions. [2022-01-10 14:36:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 14:36:13,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-01-10 14:36:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:36:13,278 INFO L225 Difference]: With dead ends: 144 [2022-01-10 14:36:13,278 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 14:36:13,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 14:36:13,282 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 42 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 14:36:13,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 306 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 14:36:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 14:36:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-01-10 14:36:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 14 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2022-01-10 14:36:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-01-10 14:36:13,312 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 31 [2022-01-10 14:36:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:36:13,313 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-01-10 14:36:13,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 14:36:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-01-10 14:36:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 14:36:13,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:36:13,315 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:36:13,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 14:36:13,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-01-10 14:36:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:36:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash -653347844, now seen corresponding path program 1 times [2022-01-10 14:36:13,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:36:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111814920] [2022-01-10 14:36:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:13,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:36:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-10 14:36:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 14:36:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-10 14:36:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:36:13,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:36:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111814920] [2022-01-10 14:36:13,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111814920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:36:13,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315662420] [2022-01-10 14:36:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:13,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:36:13,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:36:13,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:36:13,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 14:36:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 14:36:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:36:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:36:14,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:36:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:36:14,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315662420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:36:14,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:36:14,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 22 [2022-01-10 14:36:14,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312575695] [2022-01-10 14:36:14,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:36:14,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 14:36:14,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:36:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 14:36:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-01-10 14:36:14,473 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (15), 4 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 14:36:17,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 14:36:19,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 14:36:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:36:19,996 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2022-01-10 14:36:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 14:36:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (15), 4 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 43 [2022-01-10 14:36:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:36:19,999 INFO L225 Difference]: With dead ends: 149 [2022-01-10 14:36:19,999 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 14:36:20,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-01-10 14:36:20,000 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 92 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-01-10 14:36:20,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 886 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 630 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-01-10 14:36:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 14:36:20,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-01-10 14:36:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 60 states have internal predecessors, (68), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 14:36:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-01-10 14:36:20,021 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 43 [2022-01-10 14:36:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:36:20,021 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-01-10 14:36:20,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (15), 4 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 14:36:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-01-10 14:36:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 14:36:20,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:36:20,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:36:20,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 14:36:20,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:36:20,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-01-10 14:36:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:36:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -28559344, now seen corresponding path program 1 times [2022-01-10 14:36:20,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:36:20,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547845393] [2022-01-10 14:36:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:20,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:36:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 14:36:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 14:36:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 14:36:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 14:36:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 14:36:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 14:36:20,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:36:20,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547845393] [2022-01-10 14:36:20,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547845393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:36:20,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:36:20,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 14:36:20,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748981356] [2022-01-10 14:36:20,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:36:20,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 14:36:20,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:36:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 14:36:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 14:36:20,465 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 14:36:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:36:21,236 INFO L93 Difference]: Finished difference Result 140 states and 181 transitions. [2022-01-10 14:36:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 14:36:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2022-01-10 14:36:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:36:21,238 INFO L225 Difference]: With dead ends: 140 [2022-01-10 14:36:21,238 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 14:36:21,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-10 14:36:21,240 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 108 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 14:36:21,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 399 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 14:36:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 14:36:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-01-10 14:36:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 62 states have internal predecessors, (69), 14 states have call successors, (14), 4 states have call predecessors, (14), 7 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2022-01-10 14:36:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-01-10 14:36:21,249 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 53 [2022-01-10 14:36:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:36:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-01-10 14:36:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 14:36:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-01-10 14:36:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 14:36:21,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:36:21,251 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 14:36:21,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 14:36:21,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-01-10 14:36:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:36:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2030455628, now seen corresponding path program 1 times [2022-01-10 14:36:21,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:36:21,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512349057] [2022-01-10 14:36:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:21,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:36:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 14:36:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 14:36:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 14:36:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 14:36:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-10 14:36:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 14:36:21,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:36:21,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512349057] [2022-01-10 14:36:21,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512349057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:36:21,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:36:21,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 14:36:21,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847199422] [2022-01-10 14:36:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:36:21,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 14:36:21,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:36:21,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 14:36:21,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 14:36:21,452 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 14:36:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:36:22,878 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2022-01-10 14:36:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 14:36:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 66 [2022-01-10 14:36:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:36:22,880 INFO L225 Difference]: With dead ends: 132 [2022-01-10 14:36:22,880 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 14:36:22,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-10 14:36:22,881 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 99 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 14:36:22,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 389 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 14:36:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 14:36:22,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-10 14:36:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 64 states have internal predecessors, (70), 14 states have call successors, (14), 4 states have call predecessors, (14), 8 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2022-01-10 14:36:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2022-01-10 14:36:22,892 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 66 [2022-01-10 14:36:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:36:22,892 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2022-01-10 14:36:22,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 14:36:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2022-01-10 14:36:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 14:36:22,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:36:22,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:36:22,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 14:36:22,898 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-01-10 14:36:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:36:22,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1646946915, now seen corresponding path program 1 times [2022-01-10 14:36:22,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:36:22,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281894970] [2022-01-10 14:36:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:22,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:36:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 14:36:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 14:36:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 14:36:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 14:36:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-10 14:36:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-10 14:36:23,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:36:23,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281894970] [2022-01-10 14:36:23,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281894970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:36:23,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:36:23,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 14:36:23,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845960596] [2022-01-10 14:36:23,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:36:23,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 14:36:23,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:36:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 14:36:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 14:36:23,265 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 14:36:25,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 14:36:27,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 14:36:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:36:27,310 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2022-01-10 14:36:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 14:36:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 78 [2022-01-10 14:36:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:36:27,312 INFO L225 Difference]: With dead ends: 138 [2022-01-10 14:36:27,313 INFO L226 Difference]: Without dead ends: 86 [2022-01-10 14:36:27,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-10 14:36:27,314 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 76 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:36:27,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 275 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-01-10 14:36:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-10 14:36:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-01-10 14:36:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 66 states have internal predecessors, (72), 14 states have call successors, (14), 4 states have call predecessors, (14), 8 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2022-01-10 14:36:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2022-01-10 14:36:27,322 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 78 [2022-01-10 14:36:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:36:27,322 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2022-01-10 14:36:27,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 14:36:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2022-01-10 14:36:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 14:36:27,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:36:27,323 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:36:27,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 14:36:27,324 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-01-10 14:36:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:36:27,324 INFO L85 PathProgramCache]: Analyzing trace with hash 887599230, now seen corresponding path program 1 times [2022-01-10 14:36:27,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:36:27,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229903764] [2022-01-10 14:36:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:27,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:36:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 14:36:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 14:36:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 14:36:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 14:36:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 14:36:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 14:36:27,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:36:27,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229903764] [2022-01-10 14:36:27,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229903764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:36:27,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471180587] [2022-01-10 14:36:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:27,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:36:27,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:36:27,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:36:27,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 14:36:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 14:36:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:36:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-10 14:36:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:36:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 14:36:29,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471180587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:36:29,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:36:29,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 4] total 17 [2022-01-10 14:36:29,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310875555] [2022-01-10 14:36:29,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:36:29,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 14:36:29,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:36:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 14:36:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-10 14:36:29,692 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 13 states have internal predecessors, (59), 3 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 14:36:32,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 14:36:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:36:33,364 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2022-01-10 14:36:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 14:36:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 13 states have internal predecessors, (59), 3 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) Word has length 79 [2022-01-10 14:36:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:36:33,367 INFO L225 Difference]: With dead ends: 155 [2022-01-10 14:36:33,367 INFO L226 Difference]: Without dead ends: 102 [2022-01-10 14:36:33,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-10 14:36:33,368 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:36:33,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 775 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 595 Invalid, 1 Unknown, 105 Unchecked, 3.1s Time] [2022-01-10 14:36:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-10 14:36:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-01-10 14:36:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 76 states have internal predecessors, (83), 15 states have call successors, (15), 4 states have call predecessors, (15), 9 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2022-01-10 14:36:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-01-10 14:36:33,384 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 79 [2022-01-10 14:36:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:36:33,385 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-01-10 14:36:33,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 13 states have internal predecessors, (59), 3 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 14:36:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-01-10 14:36:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 14:36:33,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:36:33,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:36:33,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 14:36:33,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-10 14:36:33,592 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-01-10 14:36:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:36:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1693460386, now seen corresponding path program 2 times [2022-01-10 14:36:33,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:36:33,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977351944] [2022-01-10 14:36:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:36:33,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:36:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 14:36:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 14:36:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 14:36:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 14:36:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-10 14:36:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 14:36:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 14:36:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:36:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 14:36:33,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:36:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977351944] [2022-01-10 14:36:33,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977351944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:36:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9169601] [2022-01-10 14:36:33,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:36:33,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:36:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:36:33,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:36:33,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 14:36:36,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:36:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:36:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-10 14:36:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:36:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-10 14:36:40,131 INFO L328 TraceCheckSpWp]: Computing backward predicates...