/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/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:33:17,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:33:17,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:33:17,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 12:33:17,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 12:33:17,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 12:33:17,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 12:33:17,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 12:33:17,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 12:33:17,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 12:33:17,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 12:33:17,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 12:33:17,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:33:17,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:33:17,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:33:17,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:33:17,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:33:17,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:33:17,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:33:17,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:33:17,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:33:17,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:33:17,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:33:17,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:33:17,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:33:17,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:33:17,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:33:17,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:33:17,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:33:17,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:33:17,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:33:17,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:33:17,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:33:17,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:33:17,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:33:17,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:33:17,906 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 12:33:17,920 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:33:17,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:33:17,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:33:17,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:33:17,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:33:17,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:33:17,921 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:33:17,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:33:17,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:33:17,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:33:17,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:33:17,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:33:17,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:33:17,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:17,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:33:17,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:33:17,924 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:33:17,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:33:18,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:33:18,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:33:18,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:33:18,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:33:18,139 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:33:18,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2022-01-10 12:33:18,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5325172c2/f32e043bc4fe493eb3f6695e761bf0c1/FLAGc361fb185 [2022-01-10 12:33:18,483 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:33:18,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2022-01-10 12:33:18,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5325172c2/f32e043bc4fe493eb3f6695e761bf0c1/FLAGc361fb185 [2022-01-10 12:33:18,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5325172c2/f32e043bc4fe493eb3f6695e761bf0c1 [2022-01-10 12:33:18,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:33:18,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:33:18,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:18,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:33:18,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:33:18,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:18" (1/1) ... [2022-01-10 12:33:18,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68bdda74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:18, skipping insertion in model container [2022-01-10 12:33:18,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:18" (1/1) ... [2022-01-10 12:33:18,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:33:18,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:33:19,055 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/id2_i5_o5-1.c[548,561] [2022-01-10 12:33:19,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:19,086 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:33:19,120 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/id2_i5_o5-1.c[548,561] [2022-01-10 12:33:19,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:19,131 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:33:19,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19 WrapperNode [2022-01-10 12:33:19,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:19,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:19,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:33:19,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:33:19,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,175 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-10 12:33:19,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:19,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:33:19,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:33:19,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:33:19,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:33:19,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:33:19,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:33:19,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:33:19,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:19,261 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 12:33:19,306 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 12:33:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:33:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:33:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2022-01-10 12:33:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2022-01-10 12:33:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:33:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:33:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 12:33:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 12:33:19,376 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:33:19,377 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:33:19,449 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:33:19,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:33:19,453 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:33:19,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:19 BoogieIcfgContainer [2022-01-10 12:33:19,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:33:19,455 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:33:19,455 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:33:19,467 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:33:19,470 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:19" (1/1) ... [2022-01-10 12:33:19,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:19 BasicIcfg [2022-01-10 12:33:19,559 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:33:19,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:33:19,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:33:19,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:33:19,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:33:18" (1/4) ... [2022-01-10 12:33:19,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c88ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:19, skipping insertion in model container [2022-01-10 12:33:19,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:19" (2/4) ... [2022-01-10 12:33:19,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c88ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:19, skipping insertion in model container [2022-01-10 12:33:19,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:19" (3/4) ... [2022-01-10 12:33:19,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c88ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:33:19, skipping insertion in model container [2022-01-10 12:33:19,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:19" (4/4) ... [2022-01-10 12:33:19,564 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.cTransformedIcfg [2022-01-10 12:33:19,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:33:19,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:33:19,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:33:19,611 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 12:33:19,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:33:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:33:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:33:19,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:19,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:19,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1496045799, now seen corresponding path program 1 times [2022-01-10 12:33:19,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:19,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387034903] [2022-01-10 12:33:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:19,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:19,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:19,808 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 12:33:19,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387034903] [2022-01-10 12:33:19,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387034903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:19,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:33:19,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:33:19,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127112113] [2022-01-10 12:33:19,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:19,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:33:19,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:33:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:19,840 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 12:33:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:19,894 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-10 12:33:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:33:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 12:33:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:19,901 INFO L225 Difference]: With dead ends: 31 [2022-01-10 12:33:19,901 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 12:33:19,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:33:19,906 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:19,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 12:33:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 12:33:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 12:33:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-10 12:33:19,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2022-01-10 12:33:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:19,938 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-10 12:33:19,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 12:33:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-10 12:33:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 12:33:19,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:19,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:19,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:33:19,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1595255396, now seen corresponding path program 1 times [2022-01-10 12:33:19,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:19,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027941689] [2022-01-10 12:33:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:19,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,174 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 12:33:20,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027941689] [2022-01-10 12:33:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027941689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:20,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:33:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 12:33:20,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924232046] [2022-01-10 12:33:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 12:33:20,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 12:33:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 12:33:20,179 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:33:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:20,248 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-01-10 12:33:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:33:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-10 12:33:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:20,250 INFO L225 Difference]: With dead ends: 30 [2022-01-10 12:33:20,250 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 12:33:20,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 12:33:20,256 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:20,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 66 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 12:33:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-10 12:33:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 12:33:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-10 12:33:20,271 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2022-01-10 12:33:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:20,271 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-10 12:33:20,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:33:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-10 12:33:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 12:33:20,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:20,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:20,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:33:20,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2017215412, now seen corresponding path program 1 times [2022-01-10 12:33:20,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113382370] [2022-01-10 12:33:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:20,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:33:20,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113382370] [2022-01-10 12:33:20,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113382370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:20,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285161588] [2022-01-10 12:33:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:20,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:20,480 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 12:33:20,484 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 12:33:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:20,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:33:20,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:33:20,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:33:21,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285161588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:21,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:21,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-10 12:33:21,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442544071] [2022-01-10 12:33:21,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:21,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 12:33:21,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 12:33:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-10 12:33:21,218 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-10 12:33:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:21,402 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-01-10 12:33:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 12:33:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 22 [2022-01-10 12:33:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:21,403 INFO L225 Difference]: With dead ends: 36 [2022-01-10 12:33:21,403 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 12:33:21,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-10 12:33:21,404 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:21,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 179 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:33:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 12:33:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-10 12:33:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 12:33:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-10 12:33:21,409 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2022-01-10 12:33:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:21,410 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-10 12:33:21,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-10 12:33:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-10 12:33:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 12:33:21,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:21,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:21,428 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 12:33:21,623 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 12:33:21,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash 192794447, now seen corresponding path program 1 times [2022-01-10 12:33:21,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:21,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49092594] [2022-01-10 12:33:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:21,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 12:33:21,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49092594] [2022-01-10 12:33:21,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49092594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833117288] [2022-01-10 12:33:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:21,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:21,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:21,791 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 12:33:21,792 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 12:33:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:33:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 12:33:25,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 12:33:26,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833117288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:26,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:26,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-10 12:33:26,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280212867] [2022-01-10 12:33:26,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:26,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 12:33:26,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 12:33:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2022-01-10 12:33:26,764 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-10 12:33:28,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:28,560 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-01-10 12:33:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 12:33:28,561 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 28 [2022-01-10 12:33:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:28,561 INFO L225 Difference]: With dead ends: 42 [2022-01-10 12:33:28,562 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 12:33:28,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 12:33:28,563 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:28,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 292 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 237 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-01-10 12:33:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 12:33:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-01-10 12:33:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 12:33:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-10 12:33:28,567 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2022-01-10 12:33:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:28,567 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-10 12:33:28,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-10 12:33:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-10 12:33:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 12:33:28,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:28,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:28,584 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 12:33:28,784 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,SelfDestructingSolverStorable3 [2022-01-10 12:33:28,785 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1451199297, now seen corresponding path program 2 times [2022-01-10 12:33:28,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:28,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001899656] [2022-01-10 12:33:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:28,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:28,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:28,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:29,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 12:33:29,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001899656] [2022-01-10 12:33:29,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001899656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:29,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805249640] [2022-01-10 12:33:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:33:29,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:29,063 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 12:33:29,064 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 12:33:29,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:33:29,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:29,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 12:33:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 12:33:29,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 12:33:30,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805249640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:30,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:30,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2022-01-10 12:33:30,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793197965] [2022-01-10 12:33:30,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:30,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-10 12:33:30,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-10 12:33:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 12:33:30,541 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 23 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 15 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 12:33:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:31,271 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-01-10 12:33:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 12:33:31,271 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.53125) internal successors, (49), 23 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 15 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) Word has length 34 [2022-01-10 12:33:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:31,272 INFO L225 Difference]: With dead ends: 62 [2022-01-10 12:33:31,272 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 12:33:31,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2022-01-10 12:33:31,274 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:31,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 287 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 330 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-10 12:33:31,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 12:33:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2022-01-10 12:33:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 12:33:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-01-10 12:33:31,281 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2022-01-10 12:33:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:31,281 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-01-10 12:33:31,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.53125) internal successors, (49), 23 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 15 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 12:33:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-01-10 12:33:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 12:33:31,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:31,284 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] [2022-01-10 12:33:31,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:31,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:31,485 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash 876276802, now seen corresponding path program 2 times [2022-01-10 12:33:31,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:31,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779269188] [2022-01-10 12:33:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:31,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 12:33:31,496 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 12:33:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 12:33:31,530 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-10 12:33:31,531 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 12:33:31,531 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 12:33:31,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 12:33:31,534 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-01-10 12:33:31,536 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 12:33:31,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:33:31 BasicIcfg [2022-01-10 12:33:31,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 12:33:31,564 INFO L158 Benchmark]: Toolchain (without parser) took 12636.86ms. Allocated memory was 201.3MB in the beginning and 253.8MB in the end (delta: 52.4MB). Free memory was 152.8MB in the beginning and 99.3MB in the end (delta: 53.5MB). Peak memory consumption was 106.8MB. Max. memory is 8.0GB. [2022-01-10 12:33:31,564 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 201.3MB. Free memory was 168.9MB in the beginning and 168.8MB in the end (delta: 92.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 12:33:31,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.40ms. Allocated memory is still 201.3MB. Free memory was 152.5MB in the beginning and 179.4MB in the end (delta: -26.9MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. [2022-01-10 12:33:31,565 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.82ms. Allocated memory is still 201.3MB. Free memory was 178.8MB in the beginning and 177.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 12:33:31,565 INFO L158 Benchmark]: Boogie Preprocessor took 12.67ms. Allocated memory is still 201.3MB. Free memory was 177.7MB in the beginning and 176.7MB in the end (delta: 945.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 12:33:31,565 INFO L158 Benchmark]: RCFGBuilder took 266.20ms. Allocated memory is still 201.3MB. Free memory was 176.7MB in the beginning and 166.8MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-10 12:33:31,565 INFO L158 Benchmark]: IcfgTransformer took 104.35ms. Allocated memory is still 201.3MB. Free memory was 166.8MB in the beginning and 163.6MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-10 12:33:31,566 INFO L158 Benchmark]: TraceAbstraction took 12003.60ms. Allocated memory was 201.3MB in the beginning and 253.8MB in the end (delta: 52.4MB). Free memory was 163.6MB in the beginning and 99.3MB in the end (delta: 64.4MB). Peak memory consumption was 118.4MB. Max. memory is 8.0GB. [2022-01-10 12:33:31,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 201.3MB. Free memory was 168.9MB in the beginning and 168.8MB in the end (delta: 92.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.40ms. Allocated memory is still 201.3MB. Free memory was 152.5MB in the beginning and 179.4MB in the end (delta: -26.9MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.82ms. Allocated memory is still 201.3MB. Free memory was 178.8MB in the beginning and 177.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.67ms. Allocated memory is still 201.3MB. Free memory was 177.7MB in the beginning and 176.7MB in the end (delta: 945.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 266.20ms. Allocated memory is still 201.3MB. Free memory was 176.7MB in the beginning and 166.8MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 104.35ms. Allocated memory is still 201.3MB. Free memory was 166.8MB in the beginning and 163.6MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * TraceAbstraction took 12003.60ms. Allocated memory was 201.3MB in the beginning and 253.8MB in the end (delta: 52.4MB). Free memory was 163.6MB in the beginning and 99.3MB in the end (delta: 64.4MB). Peak memory consumption was 118.4MB. 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: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int input = 5; VAL [input=5] [L21] CALL, EXPR id(input) VAL [\old(x)=5] [L10] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L15] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L16] CALL, EXPR id(x-1) VAL [\old(x)=3] [L10] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L15] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L16] CALL, EXPR id(x-1) VAL [\old(x)=1] [L10] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L15] COND TRUE x==0 [L15] return 0; VAL [\old(x)=0, \result=0, x=0] [L11] RET, EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=-1, x=2] [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=-2, x=3] [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=-1, x=4] [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=-4, x=5] [L11] return id2(x-1) + 1; [L21] RET, EXPR id(input) VAL [id(input)=-3, input=5] [L21] int result = id(input); [L22] COND TRUE result == 5 VAL [input=5, result=5] [L23] reach_error() VAL [input=5, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 131 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 109 mSDsluCounter, 887 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 38 IncrementalHoareTripleChecker+Unchecked, 806 mSDsCounter, 56 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 742 IncrementalHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 56 mSolverCounterUnsat, 81 mSDtfsCounter, 742 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 267 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 64, 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, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 267 ConstructedInterpolants, 7 QuantifiedInterpolants, 2278 SizeOfPredicates, 6 NumberOfNonLiveVariables, 513 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 46/102 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 12:33:31,601 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...