./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b78007c6b6ea6b815e47bde6b36f25c26c431b61fea97b83eeeefa52c8c4206a --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 05:35:53,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 05:35:53,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 05:35:53,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 05:35:53,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 05:35:53,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 05:35:53,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 05:35:53,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 05:35:53,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 05:35:53,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 05:35:53,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 05:35:53,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 05:35:53,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 05:35:53,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 05:35:53,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 05:35:53,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 05:35:53,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 05:35:53,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 05:35:53,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 05:35:53,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 05:35:53,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 05:35:53,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 05:35:53,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 05:35:53,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 05:35:53,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 05:35:53,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 05:35:53,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 05:35:53,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 05:35:53,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 05:35:53,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 05:35:53,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 05:35:53,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 05:35:53,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 05:35:53,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 05:35:53,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 05:35:53,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 05:35:53,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 05:35:53,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 05:35:53,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 05:35:53,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 05:35:53,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 05:35:53,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 05:35:53,158 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 05:35:53,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 05:35:53,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 05:35:53,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 05:35:53,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 05:35:53,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 05:35:53,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 05:35:53,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 05:35:53,160 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 05:35:53,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 05:35:53,161 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 05:35:53,161 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 05:35:53,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 05:35:53,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 05:35:53,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 05:35:53,161 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 05:35:53,162 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 05:35:53,162 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 05:35:53,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 05:35:53,162 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 05:35:53,164 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 05:35:53,164 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 05:35:53,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 05:35:53,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 05:35:53,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 05:35:53,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:35:53,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 05:35:53,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 05:35:53,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 05:35:53,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 05:35:53,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 05:35:53,166 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 05:35:53,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 05:35:53,167 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 05:35:53,167 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78007c6b6ea6b815e47bde6b36f25c26c431b61fea97b83eeeefa52c8c4206a [2023-02-18 05:35:53,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 05:35:53,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 05:35:53,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 05:35:53,351 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 05:35:53,351 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 05:35:53,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2023-02-18 05:35:54,235 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 05:35:54,511 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 05:35:54,512 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2023-02-18 05:35:54,519 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b786ec67/d1288d29ffd34287b6dce6d8fa0a16cf/FLAG66315b0ea [2023-02-18 05:35:54,529 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b786ec67/d1288d29ffd34287b6dce6d8fa0a16cf [2023-02-18 05:35:54,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 05:35:54,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 05:35:54,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 05:35:54,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 05:35:54,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 05:35:54,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f1dca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54, skipping insertion in model container [2023-02-18 05:35:54,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 05:35:54,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 05:35:54,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:35:54,735 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 05:35:54,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:35:54,800 INFO L208 MainTranslator]: Completed translation [2023-02-18 05:35:54,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54 WrapperNode [2023-02-18 05:35:54,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 05:35:54,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 05:35:54,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 05:35:54,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 05:35:54,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,828 INFO L138 Inliner]: procedures = 122, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-02-18 05:35:54,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 05:35:54,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 05:35:54,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 05:35:54,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 05:35:54,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 05:35:54,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 05:35:54,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 05:35:54,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 05:35:54,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (1/1) ... [2023-02-18 05:35:54,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:35:54,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:54,869 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) [2023-02-18 05:35:54,874 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 [2023-02-18 05:35:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 05:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 05:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 05:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 05:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 05:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 05:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 05:35:54,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 05:35:55,006 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 05:35:55,007 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 05:35:55,217 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 05:35:55,221 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 05:35:55,222 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 05:35:55,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:35:55 BoogieIcfgContainer [2023-02-18 05:35:55,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 05:35:55,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 05:35:55,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 05:35:55,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 05:35:55,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:35:54" (1/3) ... [2023-02-18 05:35:55,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4ca58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:35:55, skipping insertion in model container [2023-02-18 05:35:55,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:35:54" (2/3) ... [2023-02-18 05:35:55,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4ca58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:35:55, skipping insertion in model container [2023-02-18 05:35:55,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:35:55" (3/3) ... [2023-02-18 05:35:55,233 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2023-02-18 05:35:55,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 05:35:55,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-02-18 05:35:55,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 05:35:55,282 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@681e61fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 05:35:55,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-02-18 05:35:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 32 states have (on average 1.875) internal successors, (60), 53 states have internal predecessors, (60), 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) [2023-02-18 05:35:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-18 05:35:55,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:55,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-18 05:35:55,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash 28702701, now seen corresponding path program 1 times [2023-02-18 05:35:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:55,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216906995] [2023-02-18 05:35:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:55,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:55,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:55,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216906995] [2023-02-18 05:35:55,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216906995] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:55,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:55,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:35:55,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696945761] [2023-02-18 05:35:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:55,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 05:35:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 05:35:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 05:35:55,417 INFO L87 Difference]: Start difference. First operand has 54 states, 32 states have (on average 1.875) internal successors, (60), 53 states have internal predecessors, (60), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-02-18 05:35:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:55,427 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2023-02-18 05:35:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 05:35:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-02-18 05:35:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:55,434 INFO L225 Difference]: With dead ends: 54 [2023-02-18 05:35:55,434 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 05:35:55,435 INFO L412 NwaCegarLoop]: 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 [2023-02-18 05:35:55,437 INFO L413 NwaCegarLoop]: 57 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, 57 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 [2023-02-18 05:35:55,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 05:35:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-18 05:35:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 51 states have internal predecessors, (55), 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) [2023-02-18 05:35:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-02-18 05:35:55,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 5 [2023-02-18 05:35:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:55,469 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-02-18 05:35:55,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-02-18 05:35:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-02-18 05:35:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 05:35:55,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:55,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 05:35:55,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 05:35:55,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 889569384, now seen corresponding path program 1 times [2023-02-18 05:35:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291437856] [2023-02-18 05:35:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:55,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291437856] [2023-02-18 05:35:55,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291437856] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:55,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:55,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:35:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876063208] [2023-02-18 05:35:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:55,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:35:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:35:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:35:55,578 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2023-02-18 05:35:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:55,624 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-02-18 05:35:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:35:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2023-02-18 05:35:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:55,625 INFO L225 Difference]: With dead ends: 51 [2023-02-18 05:35:55,626 INFO L226 Difference]: Without dead ends: 51 [2023-02-18 05:35:55,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:35:55,630 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:55,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 85 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-18 05:35:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-18 05:35:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 50 states have internal predecessors, (54), 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) [2023-02-18 05:35:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-02-18 05:35:55,637 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 6 [2023-02-18 05:35:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:55,638 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-02-18 05:35:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2023-02-18 05:35:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-02-18 05:35:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 05:35:55,638 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:55,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 05:35:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 05:35:55,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 889569385, now seen corresponding path program 1 times [2023-02-18 05:35:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:55,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43692388] [2023-02-18 05:35:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43692388] [2023-02-18 05:35:55,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43692388] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:55,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:55,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:35:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385216624] [2023-02-18 05:35:55,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:35:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:35:55,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:35:55,768 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2023-02-18 05:35:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:55,809 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2023-02-18 05:35:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:35:55,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 [2023-02-18 05:35:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:55,811 INFO L225 Difference]: With dead ends: 99 [2023-02-18 05:35:55,811 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 05:35:55,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:35:55,812 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 49 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:55,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:55,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 05:35:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2023-02-18 05:35:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 54 states have internal predecessors, (59), 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) [2023-02-18 05:35:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-02-18 05:35:55,841 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 6 [2023-02-18 05:35:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:55,841 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-02-18 05:35:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2023-02-18 05:35:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-02-18 05:35:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:35:55,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:55,842 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:55,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 05:35:55,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:55,843 INFO L85 PathProgramCache]: Analyzing trace with hash 179257870, now seen corresponding path program 1 times [2023-02-18 05:35:55,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:55,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661667685] [2023-02-18 05:35:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:55,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:55,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:55,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661667685] [2023-02-18 05:35:55,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661667685] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:35:55,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443314656] [2023-02-18 05:35:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:55,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:55,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:55,927 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) [2023-02-18 05:35:55,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 05:35:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:56,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 05:35:56,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:35:56,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:35:56,083 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-18 05:35:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:56,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:35:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:56,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443314656] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:35:56,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:35:56,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-18 05:35:56,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159735801] [2023-02-18 05:35:56,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:35:56,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 05:35:56,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:56,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 05:35:56,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:35:56,143 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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) [2023-02-18 05:35:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:56,243 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2023-02-18 05:35:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 05:35:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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 8 [2023-02-18 05:35:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:56,244 INFO L225 Difference]: With dead ends: 146 [2023-02-18 05:35:56,245 INFO L226 Difference]: Without dead ends: 146 [2023-02-18 05:35:56,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-18 05:35:56,247 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 344 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:56,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 289 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:35:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-18 05:35:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 50. [2023-02-18 05:35:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 49 states have internal predecessors, (53), 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) [2023-02-18 05:35:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-02-18 05:35:56,258 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 8 [2023-02-18 05:35:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:56,259 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-02-18 05:35:56,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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) [2023-02-18 05:35:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-02-18 05:35:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 05:35:56,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:56,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:56,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 05:35:56,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:56,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1213292751, now seen corresponding path program 1 times [2023-02-18 05:35:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:56,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633298606] [2023-02-18 05:35:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:56,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:56,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633298606] [2023-02-18 05:35:56,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633298606] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:56,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:56,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:35:56,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202362545] [2023-02-18 05:35:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:56,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:35:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:35:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:35:56,538 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-02-18 05:35:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:56,566 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-02-18 05:35:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:35:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-02-18 05:35:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:56,567 INFO L225 Difference]: With dead ends: 47 [2023-02-18 05:35:56,568 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 05:35:56,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:35:56,571 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:56,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 49 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 05:35:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-18 05:35:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 46 states have internal predecessors, (50), 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) [2023-02-18 05:35:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-02-18 05:35:56,575 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 9 [2023-02-18 05:35:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:56,576 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-02-18 05:35:56,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-02-18 05:35:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-02-18 05:35:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 05:35:56,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:56,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:56,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 05:35:56,578 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1213292752, now seen corresponding path program 1 times [2023-02-18 05:35:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:56,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282110693] [2023-02-18 05:35:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:56,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:56,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:56,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282110693] [2023-02-18 05:35:56,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282110693] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:56,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:56,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:35:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302686055] [2023-02-18 05:35:56,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:56,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:35:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:35:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:35:56,689 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2023-02-18 05:35:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:56,766 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-02-18 05:35:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:35:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2023-02-18 05:35:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:56,767 INFO L225 Difference]: With dead ends: 82 [2023-02-18 05:35:56,767 INFO L226 Difference]: Without dead ends: 82 [2023-02-18 05:35:56,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:35:56,771 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 151 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:56,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 72 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:35:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-18 05:35:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 47. [2023-02-18 05:35:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 46 states have internal predecessors, (51), 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) [2023-02-18 05:35:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-18 05:35:56,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 9 [2023-02-18 05:35:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:56,782 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-18 05:35:56,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2023-02-18 05:35:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-18 05:35:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 05:35:56,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:56,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:56,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 05:35:56,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2038145083, now seen corresponding path program 1 times [2023-02-18 05:35:56,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:56,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574239780] [2023-02-18 05:35:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:56,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:56,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:56,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574239780] [2023-02-18 05:35:56,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574239780] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:56,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:56,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:35:56,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913940355] [2023-02-18 05:35:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:56,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:35:56,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:35:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:35:56,825 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-18 05:35:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:56,856 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2023-02-18 05:35:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:35:56,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2023-02-18 05:35:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:56,858 INFO L225 Difference]: With dead ends: 89 [2023-02-18 05:35:56,858 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 05:35:56,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:35:56,859 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 37 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:56,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 05:35:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2023-02-18 05:35:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 58 states have internal predecessors, (66), 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) [2023-02-18 05:35:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2023-02-18 05:35:56,869 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2023-02-18 05:35:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:56,869 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2023-02-18 05:35:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-18 05:35:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2023-02-18 05:35:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 05:35:56,870 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:56,870 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:56,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 05:35:56,870 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1240415274, now seen corresponding path program 1 times [2023-02-18 05:35:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453468767] [2023-02-18 05:35:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453468767] [2023-02-18 05:35:56,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453468767] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:35:56,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318744203] [2023-02-18 05:35:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:56,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:56,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:56,925 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) [2023-02-18 05:35:56,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 05:35:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 05:35:57,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:35:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:57,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:35:57,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318744203] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:57,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:35:57,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-02-18 05:35:57,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550582283] [2023-02-18 05:35:57,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:57,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:35:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:35:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:35:57,032 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-18 05:35:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:57,057 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2023-02-18 05:35:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:35:57,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2023-02-18 05:35:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:57,057 INFO L225 Difference]: With dead ends: 86 [2023-02-18 05:35:57,058 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 05:35:57,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:35:57,058 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:57,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 169 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:57,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 05:35:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2023-02-18 05:35:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 57 states have internal predecessors, (63), 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) [2023-02-18 05:35:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-02-18 05:35:57,060 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 12 [2023-02-18 05:35:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:57,061 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-02-18 05:35:57,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-18 05:35:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-02-18 05:35:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 05:35:57,061 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:57,061 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:57,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 05:35:57,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 05:35:57,266 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2776502, now seen corresponding path program 1 times [2023-02-18 05:35:57,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:57,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134348090] [2023-02-18 05:35:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:57,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:57,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134348090] [2023-02-18 05:35:57,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134348090] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:35:57,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110685951] [2023-02-18 05:35:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:57,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:57,291 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) [2023-02-18 05:35:57,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 05:35:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:57,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 05:35:57,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:35:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:57,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:35:57,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110685951] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:57,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:35:57,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-18 05:35:57,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862365746] [2023-02-18 05:35:57,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:57,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:35:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:35:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:35:57,384 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-02-18 05:35:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:57,415 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2023-02-18 05:35:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:35:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 [2023-02-18 05:35:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:57,416 INFO L225 Difference]: With dead ends: 92 [2023-02-18 05:35:57,416 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 05:35:57,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:35:57,418 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 103 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:57,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 135 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 05:35:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2023-02-18 05:35:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.4) internal successors, (63), 58 states have internal predecessors, (63), 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) [2023-02-18 05:35:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-02-18 05:35:57,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 13 [2023-02-18 05:35:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:57,420 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-02-18 05:35:57,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-02-18 05:35:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-02-18 05:35:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 05:35:57,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:57,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:57,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 05:35:57,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:57,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:57,627 INFO L85 PathProgramCache]: Analyzing trace with hash 87668155, now seen corresponding path program 1 times [2023-02-18 05:35:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:57,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900870667] [2023-02-18 05:35:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:57,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:57,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900870667] [2023-02-18 05:35:57,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900870667] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:35:57,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995834601] [2023-02-18 05:35:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:57,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:57,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:57,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:35:57,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 05:35:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:57,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 05:35:57,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:35:57,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:35:57,938 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 13 treesize of output 31 [2023-02-18 05:35:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:58,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:35:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:58,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995834601] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:35:58,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:35:58,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-02-18 05:35:58,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588088250] [2023-02-18 05:35:58,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:35:58,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 05:35:58,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:58,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 05:35:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-02-18 05:35:58,172 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 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) [2023-02-18 05:35:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:58,594 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2023-02-18 05:35:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 05:35:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 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 14 [2023-02-18 05:35:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:58,595 INFO L225 Difference]: With dead ends: 179 [2023-02-18 05:35:58,595 INFO L226 Difference]: Without dead ends: 179 [2023-02-18 05:35:58,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2023-02-18 05:35:58,596 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 445 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:58,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 562 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 05:35:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-18 05:35:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 79. [2023-02-18 05:35:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 78 states have internal predecessors, (89), 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) [2023-02-18 05:35:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-02-18 05:35:58,599 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 14 [2023-02-18 05:35:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:58,599 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-02-18 05:35:58,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 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) [2023-02-18 05:35:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-02-18 05:35:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 05:35:58,599 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:58,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:58,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 05:35:58,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:58,804 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash 685561807, now seen corresponding path program 1 times [2023-02-18 05:35:58,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:58,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533734685] [2023-02-18 05:35:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:58,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:35:58,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:58,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533734685] [2023-02-18 05:35:58,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533734685] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:58,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:58,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:35:58,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088034777] [2023-02-18 05:35:58,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:35:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:58,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:35:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:35:58,826 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-18 05:35:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:58,848 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2023-02-18 05:35:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:35:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2023-02-18 05:35:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:58,849 INFO L225 Difference]: With dead ends: 77 [2023-02-18 05:35:58,849 INFO L226 Difference]: Without dead ends: 77 [2023-02-18 05:35:58,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:35:58,850 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:58,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-18 05:35:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-02-18 05:35:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.323076923076923) internal successors, (86), 76 states have internal predecessors, (86), 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) [2023-02-18 05:35:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-02-18 05:35:58,852 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 15 [2023-02-18 05:35:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:58,852 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-02-18 05:35:58,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-18 05:35:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-02-18 05:35:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 05:35:58,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:58,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:58,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 05:35:58,853 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:58,854 INFO L85 PathProgramCache]: Analyzing trace with hash 685561808, now seen corresponding path program 1 times [2023-02-18 05:35:58,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:58,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757417392] [2023-02-18 05:35:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:35:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757417392] [2023-02-18 05:35:58,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757417392] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:58,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:58,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:35:58,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118437132] [2023-02-18 05:35:58,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:58,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:35:58,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:35:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:35:58,889 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-18 05:35:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:58,906 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-02-18 05:35:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:35:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2023-02-18 05:35:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:58,907 INFO L225 Difference]: With dead ends: 65 [2023-02-18 05:35:58,907 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 05:35:58,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:35:58,908 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:58,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 05:35:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-18 05:35:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 64 states have internal predecessors, (73), 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) [2023-02-18 05:35:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2023-02-18 05:35:58,910 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 15 [2023-02-18 05:35:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:58,910 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2023-02-18 05:35:58,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-18 05:35:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2023-02-18 05:35:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 05:35:58,911 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:58,911 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 05:35:58,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash 381862667, now seen corresponding path program 2 times [2023-02-18 05:35:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904801383] [2023-02-18 05:35:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:58,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:58,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904801383] [2023-02-18 05:35:58,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904801383] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:35:58,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034677698] [2023-02-18 05:35:58,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 05:35:58,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:58,945 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:35:58,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 05:35:59,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 05:35:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 05:35:59,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 05:35:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:35:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:35:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:59,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034677698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:35:59,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:35:59,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-02-18 05:35:59,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929635220] [2023-02-18 05:35:59,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:35:59,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:35:59,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:35:59,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:35:59,065 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2023-02-18 05:35:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:59,145 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2023-02-18 05:35:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 05:35:59,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) Word has length 17 [2023-02-18 05:35:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:59,146 INFO L225 Difference]: With dead ends: 96 [2023-02-18 05:35:59,146 INFO L226 Difference]: Without dead ends: 96 [2023-02-18 05:35:59,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-02-18 05:35:59,147 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 149 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:59,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 186 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:35:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-18 05:35:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2023-02-18 05:35:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.206896551724138) internal successors, (70), 63 states have internal predecessors, (70), 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) [2023-02-18 05:35:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-02-18 05:35:59,149 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 17 [2023-02-18 05:35:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:59,149 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-02-18 05:35:59,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2023-02-18 05:35:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-02-18 05:35:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 05:35:59,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:59,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:59,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 05:35:59,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 05:35:59,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1002343613, now seen corresponding path program 1 times [2023-02-18 05:35:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:59,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809055850] [2023-02-18 05:35:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:35:59,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:59,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809055850] [2023-02-18 05:35:59,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809055850] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:35:59,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:35:59,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:35:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172619365] [2023-02-18 05:35:59,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:35:59,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:35:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:35:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:35:59,386 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-18 05:35:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:59,393 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-02-18 05:35:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:35:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2023-02-18 05:35:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:59,394 INFO L225 Difference]: With dead ends: 62 [2023-02-18 05:35:59,394 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 05:35:59,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:35:59,395 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:59,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:35:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 05:35:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-18 05:35:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 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) [2023-02-18 05:35:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-02-18 05:35:59,397 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 18 [2023-02-18 05:35:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:59,397 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-02-18 05:35:59,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-18 05:35:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-02-18 05:35:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 05:35:59,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:59,398 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:59,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 05:35:59,398 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1770380747, now seen corresponding path program 1 times [2023-02-18 05:35:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725769163] [2023-02-18 05:35:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 05:35:59,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725769163] [2023-02-18 05:35:59,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725769163] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:35:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364164722] [2023-02-18 05:35:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:59,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:59,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:35:59,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 05:35:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:59,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 05:35:59,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:35:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:59,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:35:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:35:59,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364164722] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:35:59,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:35:59,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-02-18 05:35:59,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198726034] [2023-02-18 05:35:59,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:35:59,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 05:35:59,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:35:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 05:35:59,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-18 05:35:59,540 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2023-02-18 05:35:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:35:59,653 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2023-02-18 05:35:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 05:35:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 18 [2023-02-18 05:35:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:35:59,654 INFO L225 Difference]: With dead ends: 99 [2023-02-18 05:35:59,654 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 05:35:59,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2023-02-18 05:35:59,655 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 209 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:35:59,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 224 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:35:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 05:35:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2023-02-18 05:35:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 66 states have internal predecessors, (73), 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) [2023-02-18 05:35:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2023-02-18 05:35:59,657 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 18 [2023-02-18 05:35:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:35:59,657 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2023-02-18 05:35:59,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2023-02-18 05:35:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2023-02-18 05:35:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 05:35:59,658 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:35:59,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:35:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 05:35:59,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 05:35:59,864 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:35:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:35:59,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1897750454, now seen corresponding path program 2 times [2023-02-18 05:35:59,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:35:59,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131372640] [2023-02-18 05:35:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:35:59,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:35:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:35:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 05:35:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:35:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131372640] [2023-02-18 05:35:59,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131372640] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:35:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097958657] [2023-02-18 05:35:59,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 05:35:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:35:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:35:59,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:35:59,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 05:36:00,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 05:36:00,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 05:36:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 05:36:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:36:00,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:36:00,058 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-18 05:36:00,079 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-18 05:36:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 05:36:00,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:36:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 05:36:00,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097958657] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 05:36:00,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 05:36:00,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 17 [2023-02-18 05:36:00,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280637782] [2023-02-18 05:36:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:36:00,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:36:00,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:36:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:36:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-02-18 05:36:00,377 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-18 05:36:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:36:00,443 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2023-02-18 05:36:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:36:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 19 [2023-02-18 05:36:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:36:00,444 INFO L225 Difference]: With dead ends: 81 [2023-02-18 05:36:00,444 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 05:36:00,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-02-18 05:36:00,445 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:36:00,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:36:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 05:36:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2023-02-18 05:36:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.126984126984127) internal successors, (71), 66 states have internal predecessors, (71), 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) [2023-02-18 05:36:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-02-18 05:36:00,446 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 19 [2023-02-18 05:36:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:36:00,447 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-02-18 05:36:00,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-18 05:36:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-02-18 05:36:00,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 05:36:00,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:36:00,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:36:00,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 05:36:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:36:00,653 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:36:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:36:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash -951175098, now seen corresponding path program 3 times [2023-02-18 05:36:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:36:00,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852813490] [2023-02-18 05:36:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:36:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:36:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:36:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:36:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:36:00,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852813490] [2023-02-18 05:36:00,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852813490] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:36:00,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101052015] [2023-02-18 05:36:00,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 05:36:00,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:36:00,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:36:00,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:36:00,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 05:36:00,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 05:36:00,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 05:36:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 05:36:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:36:00,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:36:00,818 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 17 treesize of output 37 [2023-02-18 05:36:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 05:36:00,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:36:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 05:36:00,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101052015] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:36:00,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:36:00,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 20 [2023-02-18 05:36:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925371505] [2023-02-18 05:36:00,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:36:00,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 05:36:00,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:36:00,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 05:36:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-02-18 05:36:00,998 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 21 states have internal predecessors, (48), 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) [2023-02-18 05:36:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:36:01,481 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2023-02-18 05:36:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 05:36:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 21 states have internal predecessors, (48), 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 19 [2023-02-18 05:36:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:36:01,482 INFO L225 Difference]: With dead ends: 98 [2023-02-18 05:36:01,482 INFO L226 Difference]: Without dead ends: 98 [2023-02-18 05:36:01,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 05:36:01,483 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 371 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 05:36:01,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 148 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 05:36:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-18 05:36:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2023-02-18 05:36:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 65 states have internal predecessors, (70), 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) [2023-02-18 05:36:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2023-02-18 05:36:01,485 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 19 [2023-02-18 05:36:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:36:01,485 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2023-02-18 05:36:01,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 21 states have internal predecessors, (48), 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) [2023-02-18 05:36:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2023-02-18 05:36:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 05:36:01,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:36:01,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:36:01,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 05:36:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 05:36:01,690 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-02-18 05:36:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:36:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1179541311, now seen corresponding path program 1 times [2023-02-18 05:36:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:36:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799242982] [2023-02-18 05:36:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:36:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:36:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 05:36:01,699 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 05:36:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 05:36:01,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 05:36:01,713 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 05:36:01,714 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (20 of 21 remaining) [2023-02-18 05:36:01,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2023-02-18 05:36:01,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2023-02-18 05:36:01,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2023-02-18 05:36:01,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2023-02-18 05:36:01,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2023-02-18 05:36:01,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2023-02-18 05:36:01,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2023-02-18 05:36:01,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2023-02-18 05:36:01,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (11 of 21 remaining) [2023-02-18 05:36:01,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (10 of 21 remaining) [2023-02-18 05:36:01,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (9 of 21 remaining) [2023-02-18 05:36:01,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2023-02-18 05:36:01,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2023-02-18 05:36:01,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2023-02-18 05:36:01,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (5 of 21 remaining) [2023-02-18 05:36:01,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2023-02-18 05:36:01,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2023-02-18 05:36:01,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2023-02-18 05:36:01,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (1 of 21 remaining) [2023-02-18 05:36:01,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2023-02-18 05:36:01,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 05:36:01,720 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:36:01,722 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 05:36:01,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 05:36:01 BoogieIcfgContainer [2023-02-18 05:36:01,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 05:36:01,741 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 05:36:01,741 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 05:36:01,741 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 05:36:01,741 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:35:55" (3/4) ... [2023-02-18 05:36:01,743 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 05:36:01,779 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 05:36:01,779 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 05:36:01,780 INFO L158 Benchmark]: Toolchain (without parser) took 7248.03ms. Allocated memory was 203.4MB in the beginning and 276.8MB in the end (delta: 73.4MB). Free memory was 165.0MB in the beginning and 166.8MB in the end (delta: -1.8MB). Peak memory consumption was 74.4MB. Max. memory is 16.1GB. [2023-02-18 05:36:01,780 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 84.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 05:36:01,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.93ms. Allocated memory is still 203.4MB. Free memory was 165.0MB in the beginning and 149.1MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-02-18 05:36:01,780 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.89ms. Allocated memory is still 203.4MB. Free memory was 148.3MB in the beginning and 147.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 05:36:01,781 INFO L158 Benchmark]: Boogie Preprocessor took 16.28ms. Allocated memory is still 203.4MB. Free memory was 147.0MB in the beginning and 145.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 05:36:01,781 INFO L158 Benchmark]: RCFGBuilder took 377.47ms. Allocated memory is still 203.4MB. Free memory was 144.9MB in the beginning and 132.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 05:36:01,781 INFO L158 Benchmark]: TraceAbstraction took 6515.47ms. Allocated memory was 203.4MB in the beginning and 276.8MB in the end (delta: 73.4MB). Free memory was 131.5MB in the beginning and 168.9MB in the end (delta: -37.3MB). Peak memory consumption was 38.8MB. Max. memory is 16.1GB. [2023-02-18 05:36:01,781 INFO L158 Benchmark]: Witness Printer took 38.29ms. Allocated memory is still 276.8MB. Free memory was 168.9MB in the beginning and 166.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 05:36:01,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 84.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.93ms. Allocated memory is still 203.4MB. Free memory was 165.0MB in the beginning and 149.1MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.89ms. Allocated memory is still 203.4MB. Free memory was 148.3MB in the beginning and 147.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.28ms. Allocated memory is still 203.4MB. Free memory was 147.0MB in the beginning and 145.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 377.47ms. Allocated memory is still 203.4MB. Free memory was 144.9MB in the beginning and 132.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6515.47ms. Allocated memory was 203.4MB in the beginning and 276.8MB in the end (delta: 73.4MB). Free memory was 131.5MB in the beginning and 168.9MB in the end (delta: -37.3MB). Peak memory consumption was 38.8MB. Max. memory is 16.1GB. * Witness Printer took 38.29ms. Allocated memory is still 276.8MB. Free memory was 168.9MB in the beginning and 166.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={-3:0}, b={-2:4}, b++={-2:0}, n=1] [L542] *b++ = 0 VAL [a={-3:0}, b={-2:4}, b++={-2:0}, n=1] [L543] CALL foo() [L528] int i; [L529] i = 0 VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L529] COND TRUE i < n VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L530] a[i] = -1 VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L529] i++ VAL [a={-3:0}, b={-2:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [a={-3:0}, b={-2:4}, i=1, n=1] [L531] i = 0 VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [a={-3:0}, b={-2:4}, i=0, n=1] [L543] RET foo() [L544] b[-1] VAL [a={-3:0}, b={-2:4}, b[-1]=0, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [a={-3:0}, b={-2:4}, n=1] [L547] free(a) VAL [a={-3:0}, b={-2:4}, n=1] [L547] free(a) [L547] free(b) VAL [a={-3:0}, b={-2:4}, n=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 6.5s, OverallIterations: 18, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2087 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2087 mSDsluCounter, 2436 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1611 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1845 IncrementalHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 825 mSDtfsCounter, 1845 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 333 GetRequests, 158 SyntacticMatches, 15 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=10, InterpolantAutomatonStates: 125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 476 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 354 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 398 ConstructedInterpolants, 28 QuantifiedInterpolants, 6455 SizeOfPredicates, 28 NumberOfNonLiveVariables, 750 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 31 InterpolantComputations, 12 PerfectInterpolantSequences, 75/137 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! [2023-02-18 05:36:01,807 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(valid-free)