./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95643fe6222ef6bf06c5549a97aa2ed3c03be56764b1592b76d2122ae82e7069 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 08:25:17,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 08:25:17,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 08:25:17,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 08:25:17,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 08:25:17,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 08:25:17,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 08:25:17,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 08:25:17,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 08:25:17,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 08:25:17,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 08:25:17,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 08:25:17,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 08:25:17,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 08:25:17,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 08:25:17,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 08:25:17,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 08:25:17,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 08:25:17,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 08:25:17,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 08:25:17,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 08:25:17,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 08:25:17,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 08:25:17,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 08:25:17,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 08:25:17,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 08:25:17,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 08:25:17,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 08:25:17,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 08:25:17,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 08:25:17,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 08:25:17,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 08:25:17,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 08:25:17,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 08:25:17,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 08:25:17,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 08:25:17,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 08:25:17,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 08:25:17,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 08:25:17,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 08:25:17,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 08:25:17,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 08:25:17,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 08:25:17,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 08:25:17,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 08:25:17,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 08:25:17,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 08:25:17,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 08:25:17,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 08:25:17,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 08:25:17,974 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 08:25:17,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 08:25:17,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 08:25:17,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 08:25:17,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 08:25:17,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 08:25:17,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 08:25:17,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 08:25:17,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 08:25:17,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 08:25:17,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 08:25:17,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 08:25:17,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 08:25:17,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 08:25:17,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 08:25:17,979 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 08:25:17,979 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 08:25:17,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 08:25:17,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 08:25:17,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95643fe6222ef6bf06c5549a97aa2ed3c03be56764b1592b76d2122ae82e7069 [2021-12-17 08:25:18,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 08:25:18,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 08:25:18,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 08:25:18,224 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 08:25:18,225 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 08:25:18,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2021-12-17 08:25:18,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28856f776/c1d5329baf614bff968275c83b1b9854/FLAG92337bd70 [2021-12-17 08:25:18,678 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 08:25:18,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2021-12-17 08:25:18,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28856f776/c1d5329baf614bff968275c83b1b9854/FLAG92337bd70 [2021-12-17 08:25:18,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28856f776/c1d5329baf614bff968275c83b1b9854 [2021-12-17 08:25:18,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 08:25:18,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 08:25:18,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 08:25:18,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 08:25:18,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 08:25:18,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:25:18" (1/1) ... [2021-12-17 08:25:18,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@356834d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:18, skipping insertion in model container [2021-12-17 08:25:18,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:25:18" (1/1) ... [2021-12-17 08:25:18,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 08:25:18,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 08:25:18,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2021-12-17 08:25:18,971 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2021-12-17 08:25:18,972 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2021-12-17 08:25:18,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 08:25:18,987 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 08:25:19,037 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2021-12-17 08:25:19,039 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2021-12-17 08:25:19,040 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2021-12-17 08:25:19,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 08:25:19,060 INFO L208 MainTranslator]: Completed translation [2021-12-17 08:25:19,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19 WrapperNode [2021-12-17 08:25:19,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 08:25:19,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 08:25:19,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 08:25:19,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 08:25:19,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,113 INFO L137 Inliner]: procedures = 119, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2021-12-17 08:25:19,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 08:25:19,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 08:25:19,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 08:25:19,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 08:25:19,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 08:25:19,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 08:25:19,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 08:25:19,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 08:25:19,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (1/1) ... [2021-12-17 08:25:19,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 08:25:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:25:19,177 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) [2021-12-17 08:25:19,183 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 [2021-12-17 08:25:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 08:25:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 08:25:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 08:25:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 08:25:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 08:25:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 08:25:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 08:25:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 08:25:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 08:25:19,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 08:25:19,317 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 08:25:19,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 08:25:19,451 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 08:25:19,455 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 08:25:19,455 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-17 08:25:19,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:25:19 BoogieIcfgContainer [2021-12-17 08:25:19,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 08:25:19,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 08:25:19,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 08:25:19,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 08:25:19,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:25:18" (1/3) ... [2021-12-17 08:25:19,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e45bf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:25:19, skipping insertion in model container [2021-12-17 08:25:19,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:25:19" (2/3) ... [2021-12-17 08:25:19,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e45bf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:25:19, skipping insertion in model container [2021-12-17 08:25:19,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:25:19" (3/3) ... [2021-12-17 08:25:19,462 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2021-12-17 08:25:19,466 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 08:25:19,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-12-17 08:25:19,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 08:25:19,506 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 [2021-12-17 08:25:19,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 08:25:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 25 states have (on average 1.84) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 08:25:19,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:25:19,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 08:25:19,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:25:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:25:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 889968582, now seen corresponding path program 1 times [2021-12-17 08:25:19,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:25:19,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946137624] [2021-12-17 08:25:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:25:19,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:25:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:25:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:25:19,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:25:19,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946137624] [2021-12-17 08:25:19,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946137624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:25:19,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:25:19,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 08:25:19,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312004228] [2021-12-17 08:25:19,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:25:19,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 08:25:19,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:25:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 08:25:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 08:25:19,706 INFO L87 Difference]: Start difference. First operand has 29 states, 25 states have (on average 1.84) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:25:19,716 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2021-12-17 08:25:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 08:25:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 08:25:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:25:19,722 INFO L225 Difference]: With dead ends: 53 [2021-12-17 08:25:19,722 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 08:25:19,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 08:25:19,726 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:25:19,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:25:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 08:25:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-17 08:25:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-17 08:25:19,767 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2021-12-17 08:25:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:25:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-17 08:25:19,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-17 08:25:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 08:25:19,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:25:19,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:25:19,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 08:25:19,784 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:25:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:25:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1806853233, now seen corresponding path program 1 times [2021-12-17 08:25:19,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:25:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808877844] [2021-12-17 08:25:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:25:19,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:25:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:25:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:25:19,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:25:19,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808877844] [2021-12-17 08:25:19,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808877844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:25:19,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:25:19,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 08:25:19,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644845670] [2021-12-17 08:25:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:25:19,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 08:25:19,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:25:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 08:25:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 08:25:19,886 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:25:19,930 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-12-17 08:25:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 08:25:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 08:25:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:25:19,933 INFO L225 Difference]: With dead ends: 31 [2021-12-17 08:25:19,933 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 08:25:19,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 08:25:19,934 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:25:19,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:25:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 08:25:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-12-17 08:25:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-17 08:25:19,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2021-12-17 08:25:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:25:19,945 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-17 08:25:19,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-17 08:25:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 08:25:19,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:25:19,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:25:19,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 08:25:19,950 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:25:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:25:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash -856511048, now seen corresponding path program 1 times [2021-12-17 08:25:19,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:25:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829478873] [2021-12-17 08:25:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:25:19,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:25:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:25:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:25:20,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:25:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829478873] [2021-12-17 08:25:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829478873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:25:20,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:25:20,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 08:25:20,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366854059] [2021-12-17 08:25:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:25:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 08:25:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:25:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 08:25:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 08:25:20,085 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:25:20,144 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-17 08:25:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 08:25:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 08:25:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:25:20,145 INFO L225 Difference]: With dead ends: 47 [2021-12-17 08:25:20,145 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 08:25:20,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 08:25:20,147 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:25:20,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 67 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:25:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 08:25:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2021-12-17 08:25:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-17 08:25:20,155 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2021-12-17 08:25:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:25:20,155 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-17 08:25:20,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-17 08:25:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 08:25:20,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:25:20,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:25:20,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 08:25:20,157 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:25:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:25:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1594081566, now seen corresponding path program 1 times [2021-12-17 08:25:20,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:25:20,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695418953] [2021-12-17 08:25:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:25:20,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:25:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:25:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:25:20,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:25:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695418953] [2021-12-17 08:25:20,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695418953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:25:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133323281] [2021-12-17 08:25:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:25:20,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:25:20,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:25:20,353 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) [2021-12-17 08:25:20,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 08:25:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:25:20,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 08:25:20,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:25:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 08:25:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 08:25:20,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 08:25:20,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-17 08:25:20,602 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 08:25:20,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-17 08:25:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-17 08:25:20,633 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 08:25:20,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 08:25:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 08:25:20,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 08:25:20,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-17 08:25:20,707 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-17 08:25:20,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-17 08:25:20,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 08:25:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:25:20,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 08:25:20,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 08:25:20,897 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-17 08:25:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 1 [2021-12-17 08:25:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:25:20,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133323281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 08:25:20,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 08:25:20,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-17 08:25:20,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995652911] [2021-12-17 08:25:20,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 08:25:20,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 08:25:20,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:25:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 08:25:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-17 08:25:20,901 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:25:21,046 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-17 08:25:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 08:25:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 08:25:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:25:21,048 INFO L225 Difference]: With dead ends: 39 [2021-12-17 08:25:21,048 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 08:25:21,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-17 08:25:21,049 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 08:25:21,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 88 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 75 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-12-17 08:25:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 08:25:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 19. [2021-12-17 08:25:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-17 08:25:21,052 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2021-12-17 08:25:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:25:21,052 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-17 08:25:21,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-17 08:25:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 08:25:21,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:25:21,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:25:21,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 08:25:21,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:25:21,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:25:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:25:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash -839217458, now seen corresponding path program 1 times [2021-12-17 08:25:21,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:25:21,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534864155] [2021-12-17 08:25:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:25:21,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:25:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:25:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:25:21,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:25:21,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534864155] [2021-12-17 08:25:21,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534864155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:25:21,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:25:21,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 08:25:21,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102594615] [2021-12-17 08:25:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:25:21,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 08:25:21,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:25:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 08:25:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 08:25:21,345 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:25:21,395 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-12-17 08:25:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 08:25:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 08:25:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:25:21,396 INFO L225 Difference]: With dead ends: 35 [2021-12-17 08:25:21,396 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 08:25:21,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 08:25:21,397 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:25:21,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:25:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 08:25:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-12-17 08:25:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-17 08:25:21,399 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2021-12-17 08:25:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:25:21,400 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-17 08:25:21,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:25:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-17 08:25:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 08:25:21,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:25:21,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:25:21,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 08:25:21,401 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:25:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:25:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash -839157876, now seen corresponding path program 1 times [2021-12-17 08:25:21,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:25:21,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689611370] [2021-12-17 08:25:21,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:25:21,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:25:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 08:25:21,412 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 08:25:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 08:25:21,426 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 08:25:21,427 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 08:25:21,427 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-17 08:25:21,429 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-12-17 08:25:21,429 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-12-17 08:25:21,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 08:25:21,431 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-12-17 08:25:21,433 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 08:25:21,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 08:25:21 BoogieIcfgContainer [2021-12-17 08:25:21,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 08:25:21,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 08:25:21,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 08:25:21,449 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 08:25:21,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:25:19" (3/4) ... [2021-12-17 08:25:21,450 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 08:25:21,469 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 08:25:21,470 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 08:25:21,470 INFO L158 Benchmark]: Toolchain (without parser) took 2757.18ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 91.5MB in the beginning and 98.2MB in the end (delta: -6.7MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2021-12-17 08:25:21,470 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory was 56.5MB in the beginning and 56.5MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 08:25:21,471 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.31ms. Allocated memory is still 121.6MB. Free memory was 91.2MB in the beginning and 90.6MB in the end (delta: 632.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 08:25:21,471 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.49ms. Allocated memory is still 121.6MB. Free memory was 90.6MB in the beginning and 88.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 08:25:21,471 INFO L158 Benchmark]: Boogie Preprocessor took 40.41ms. Allocated memory is still 121.6MB. Free memory was 88.5MB in the beginning and 87.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 08:25:21,471 INFO L158 Benchmark]: RCFGBuilder took 301.18ms. Allocated memory is still 121.6MB. Free memory was 87.2MB in the beginning and 73.4MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 08:25:21,472 INFO L158 Benchmark]: TraceAbstraction took 1990.74ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 73.0MB in the beginning and 100.3MB in the end (delta: -27.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 08:25:21,472 INFO L158 Benchmark]: Witness Printer took 21.50ms. Allocated memory is still 146.8MB. Free memory was 99.3MB in the beginning and 98.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 08:25:21,473 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory was 56.5MB in the beginning and 56.5MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.31ms. Allocated memory is still 121.6MB. Free memory was 91.2MB in the beginning and 90.6MB in the end (delta: 632.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.49ms. Allocated memory is still 121.6MB. Free memory was 90.6MB in the beginning and 88.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.41ms. Allocated memory is still 121.6MB. Free memory was 88.5MB in the beginning and 87.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 301.18ms. Allocated memory is still 121.6MB. Free memory was 87.2MB in the beginning and 73.4MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1990.74ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 73.0MB in the beginning and 100.3MB in the end (delta: -27.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 21.50ms. Allocated memory is still 146.8MB. Free memory was 99.3MB in the beginning and 98.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * 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: 1049]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1006] SLL* list = malloc(sizeof(SLL)); [L1007] list->next = ((void*)0) [L1008] list->colour = BLACK [L1010] SLL* end = list; VAL [end={-1:0}, list={-1:0}] [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1034] end = ((void*)0) [L1035] end = list VAL [end={-1:0}, list={-1:0}] [L1038] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}] [L1039] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}] [L1039] COND FALSE !(!(BLACK == end->colour)) [L1041] COND TRUE ((void*)0) != end [L1043] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}] [L1043] COND FALSE !(RED == end->colour) [L1049] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}] [L1049] COND TRUE !(end->next) [L1049] reach_error() VAL [end={-1:0}, list={-1:0}] - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 152 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 152 mSDsluCounter, 260 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 150 mSDsCounter, 44 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 164 IncrementalHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 44 mSolverCounterUnsat, 110 mSDtfsCounter, 164 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 25, 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, 49 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 70 ConstructedInterpolants, 3 QuantifiedInterpolants, 583 SizeOfPredicates, 7 NumberOfNonLiveVariables, 176 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 0/6 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! [2021-12-17 08:25:21,519 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE