/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_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:33:20,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:33:20,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:33:20,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 12:33:20,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 12:33:20,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 12:33:20,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 12:33:20,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 12:33:20,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 12:33:20,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 12:33:20,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 12:33:20,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 12:33:20,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:33:20,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:33:20,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:33:20,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:33:20,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:33:20,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:33:20,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:33:20,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:33:20,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:33:20,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:33:20,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:33:20,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:33:20,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 12:33:20,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 12:33:20,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 12:33:20,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 12:33:20,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 12:33:20,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 12:33:20,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:33:20,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:33:20,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:33:20,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:33:20,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:33:20,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:33:20,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:33:20,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:33:20,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:33:20,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:33:20,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:33:20,764 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:33:20,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:33:20,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:33:20,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:33:20,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:33:20,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:33:20,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:33:20,788 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:33:20,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:33:20,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:33:20,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:33:20,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:20,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:33:20,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:33:20,792 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:33:20,792 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:33:21,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:33:21,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:33:21,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:33:21,026 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:33:21,027 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:33:21,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2022-01-10 12:33:21,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31013b610/bcd0ded72abd4e5aa985e33860242ebe/FLAGe8b5d45e5 [2022-01-10 12:33:21,477 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:33:21,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2022-01-10 12:33:21,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31013b610/bcd0ded72abd4e5aa985e33860242ebe/FLAGe8b5d45e5 [2022-01-10 12:33:21,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31013b610/bcd0ded72abd4e5aa985e33860242ebe [2022-01-10 12:33:21,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:33:21,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:33:21,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:21,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:33:21,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:33:21,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b25d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21, skipping insertion in model container [2022-01-10 12:33:21,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:33:21,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:33:21,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c[528,541] [2022-01-10 12:33:21,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:21,710 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:33:21,723 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c[528,541] [2022-01-10 12:33:21,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:21,735 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:33:21,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21 WrapperNode [2022-01-10 12:33:21,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:21,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:21,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:33:21,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:33:21,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,760 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-01-10 12:33:21,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:21,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:33:21,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:33:21,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:33:21,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:33:21,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:33:21,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:33:21,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:33:21,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:21,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:21,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:21,808 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 12:33:21,828 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 12:33:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:33:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:33:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:33:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:33:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 12:33:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 12:33:21,882 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:33:21,883 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:33:21,960 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:33:21,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:33:21,964 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:33:21,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:21 BoogieIcfgContainer [2022-01-10 12:33:21,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:33:21,966 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:33:21,966 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:33:21,967 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:33:21,969 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:21" (1/1) ... [2022-01-10 12:33:22,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:22 BasicIcfg [2022-01-10 12:33:22,008 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:33:22,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:33:22,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:33:22,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:33:22,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:33:21" (1/4) ... [2022-01-10 12:33:22,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f69680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:22, skipping insertion in model container [2022-01-10 12:33:22,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:21" (2/4) ... [2022-01-10 12:33:22,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f69680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:22, skipping insertion in model container [2022-01-10 12:33:22,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:21" (3/4) ... [2022-01-10 12:33:22,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f69680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:33:22, skipping insertion in model container [2022-01-10 12:33:22,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:22" (4/4) ... [2022-01-10 12:33:22,014 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.cTransformedIcfg [2022-01-10 12:33:22,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:33:22,017 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:33:22,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:33:22,052 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 12:33:22,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:33:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:33:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:33:22,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:22,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:22,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1136804482, now seen corresponding path program 1 times [2022-01-10 12:33:22,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:22,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743748610] [2022-01-10 12:33:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:22,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,282 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 12:33:22,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:22,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743748610] [2022-01-10 12:33:22,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743748610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:22,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:33:22,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:33:22,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525440595] [2022-01-10 12:33:22,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:22,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:33:22,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:33:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:22,318 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:22,368 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-01-10 12:33:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:33:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 12:33:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:22,377 INFO L225 Difference]: With dead ends: 29 [2022-01-10 12:33:22,377 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 12:33:22,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:22,395 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:22,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 12:33:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 12:33:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:33:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-10 12:33:22,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2022-01-10 12:33:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:22,426 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-10 12:33:22,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-10 12:33:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 12:33:22,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:22,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:22,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:33:22,430 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1639188531, now seen corresponding path program 1 times [2022-01-10 12:33:22,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:22,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470323774] [2022-01-10 12:33:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:22,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 12:33:22,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:22,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470323774] [2022-01-10 12:33:22,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470323774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:22,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:33:22,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:33:22,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462590175] [2022-01-10 12:33:22,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:22,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:33:22,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:33:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:22,550 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 12:33:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:22,569 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-01-10 12:33:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:33:22,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-10 12:33:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:22,570 INFO L225 Difference]: With dead ends: 22 [2022-01-10 12:33:22,570 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 12:33:22,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:22,571 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:22,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 12:33:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-01-10 12:33:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:33:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-10 12:33:22,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 17 [2022-01-10 12:33:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:22,575 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-10 12:33:22,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 12:33:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-10 12:33:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 12:33:22,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:22,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:22,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:33:22,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1610559380, now seen corresponding path program 1 times [2022-01-10 12:33:22,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:22,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200982613] [2022-01-10 12:33:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:22,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 12:33:22,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:22,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200982613] [2022-01-10 12:33:22,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200982613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:22,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598208609] [2022-01-10 12:33:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:22,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:22,743 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 12:33:22,744 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 12:33:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 12:33:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 12:33:22,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 12:33:23,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598208609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:23,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:23,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-10 12:33:23,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611150696] [2022-01-10 12:33:23,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:23,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 12:33:23,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 12:33:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-10 12:33:23,098 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 12 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 12:33:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:23,172 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-01-10 12:33:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:33:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 12 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 17 [2022-01-10 12:33:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:23,173 INFO L225 Difference]: With dead ends: 34 [2022-01-10 12:33:23,173 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 12:33:23,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-10 12:33:23,174 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:23,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 161 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 12:33:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-01-10 12:33:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 12:33:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-10 12:33:23,178 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-01-10 12:33:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:23,178 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-10 12:33:23,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 12 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 12:33:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-10 12:33:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 12:33:23,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:23,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:23,207 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 12:33:23,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:23,395 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1519992204, now seen corresponding path program 2 times [2022-01-10 12:33:23,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194234354] [2022-01-10 12:33:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:23,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 12:33:23,424 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 12:33:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 12:33:23,477 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-10 12:33:23,477 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 12:33:23,478 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 12:33:23,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 12:33:23,481 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-01-10 12:33:23,483 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 12:33:23,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:33:23 BasicIcfg [2022-01-10 12:33:23,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 12:33:23,515 INFO L158 Benchmark]: Toolchain (without parser) took 2017.99ms. Allocated memory was 195.0MB in the beginning and 283.1MB in the end (delta: 88.1MB). Free memory was 138.4MB in the beginning and 150.9MB in the end (delta: -12.5MB). Peak memory consumption was 75.9MB. Max. memory is 8.0GB. [2022-01-10 12:33:23,516 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 12:33:23,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.04ms. Allocated memory was 195.0MB in the beginning and 283.1MB in the end (delta: 88.1MB). Free memory was 138.2MB in the beginning and 255.2MB in the end (delta: -117.1MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-01-10 12:33:23,516 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.36ms. Allocated memory is still 283.1MB. Free memory was 255.2MB in the beginning and 253.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 12:33:23,516 INFO L158 Benchmark]: Boogie Preprocessor took 22.10ms. Allocated memory is still 283.1MB. Free memory was 253.7MB in the beginning and 252.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 12:33:23,516 INFO L158 Benchmark]: RCFGBuilder took 182.31ms. Allocated memory is still 283.1MB. Free memory was 252.6MB in the beginning and 243.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-10 12:33:23,517 INFO L158 Benchmark]: IcfgTransformer took 41.98ms. Allocated memory is still 283.1MB. Free memory was 243.2MB in the beginning and 240.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 12:33:23,517 INFO L158 Benchmark]: TraceAbstraction took 1504.89ms. Allocated memory is still 283.1MB. Free memory was 240.0MB in the beginning and 150.9MB in the end (delta: 89.1MB). Peak memory consumption was 89.1MB. Max. memory is 8.0GB. [2022-01-10 12:33:23,519 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.04ms. Allocated memory was 195.0MB in the beginning and 283.1MB in the end (delta: 88.1MB). Free memory was 138.2MB in the beginning and 255.2MB in the end (delta: -117.1MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.36ms. Allocated memory is still 283.1MB. Free memory was 255.2MB in the beginning and 253.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.10ms. Allocated memory is still 283.1MB. Free memory was 253.7MB in the beginning and 252.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 182.31ms. Allocated memory is still 283.1MB. Free memory was 252.6MB in the beginning and 243.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 41.98ms. Allocated memory is still 283.1MB. Free memory was 243.2MB in the beginning and 240.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 1504.89ms. Allocated memory is still 283.1MB. Free memory was 240.0MB in the beginning and 150.9MB in the end (delta: 89.1MB). Peak memory consumption was 89.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=1, \result=-1, ret=1, x=1] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=-1, x=2] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=2, \result=-2, ret=2, x=2] [L15] RET, EXPR id(input) VAL [id(input)=-2, input=2] [L15] int result = id(input); [L16] COND TRUE result == 2 VAL [input=2, result=2] [L17] reach_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6 mSDsluCounter, 284 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 235 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71 IncrementalHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 49 mSDtfsCounter, 71 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 267 SizeOfPredicates, 2 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 10/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-01-10 12:33:23,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...