./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/sll-reverse_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e8d55036 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/forester-heap/sll-reverse_simple.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 a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 22:18:27,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:18:27,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:18:27,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:18:27,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:18:27,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:18:27,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:18:27,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:18:27,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:18:27,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:18:27,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:18:27,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:18:27,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:18:27,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:18:27,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:18:27,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:18:27,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:18:27,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:18:27,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:18:27,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:18:27,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:18:27,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:18:27,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:18:27,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:18:27,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:18:27,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:18:27,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:18:27,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:18:27,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:18:27,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:18:27,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:18:27,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:18:27,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:18:27,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:18:27,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:18:27,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:18:27,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:18:27,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:18:27,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:18:27,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:18:27,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:18:27,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 22:18:27,271 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:18:27,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:18:27,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:18:27,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:18:27,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:18:27,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:18:27,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:18:27,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:18:27,274 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:18:27,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:18:27,274 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 22:18:27,275 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:18:27,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:18:27,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 22:18:27,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:18:27,275 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 22:18:27,275 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 22:18:27,275 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 22:18:27,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:18:27,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 22:18:27,276 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 22:18:27,276 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:18:27,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:18:27,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:18:27,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:18:27,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:18:27,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:18:27,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:18:27,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:18:27,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:18:27,277 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:18:27,278 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:18:27,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:18:27,278 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:18:27,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba [2023-02-15 22:18:27,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:18:27,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:18:27,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:18:27,536 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:18:27,536 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:18:27,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2023-02-15 22:18:28,620 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:18:28,828 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:18:28,829 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2023-02-15 22:18:28,837 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7a984bca/d03e86392775471981b1aa4126b4a1f3/FLAG686f6f1cd [2023-02-15 22:18:28,847 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7a984bca/d03e86392775471981b1aa4126b4a1f3 [2023-02-15 22:18:28,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:18:28,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:18:28,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:18:28,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:18:28,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:18:28,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:18:28" (1/1) ... [2023-02-15 22:18:28,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474561c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:28, skipping insertion in model container [2023-02-15 22:18:28,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:18:28" (1/1) ... [2023-02-15 22:18:28,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:18:28,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:18:29,075 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2023-02-15 22:18:29,078 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2023-02-15 22:18:29,085 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2023-02-15 22:18:29,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:18:29,102 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:18:29,135 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2023-02-15 22:18:29,137 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2023-02-15 22:18:29,140 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2023-02-15 22:18:29,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:18:29,161 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:18:29,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29 WrapperNode [2023-02-15 22:18:29,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:18:29,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:18:29,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:18:29,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:18:29,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,206 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 139 [2023-02-15 22:18:29,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:18:29,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:18:29,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:18:29,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:18:29,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:18:29,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:18:29,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:18:29,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:18:29,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (1/1) ... [2023-02-15 22:18:29,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:18:29,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:18:29,279 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) [2023-02-15 22:18:29,286 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 [2023-02-15 22:18:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 22:18:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 22:18:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 22:18:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 22:18:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 22:18:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 22:18:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 22:18:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 22:18:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:18:29,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:18:29,391 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:18:29,393 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:18:29,665 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:18:29,670 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:18:29,671 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-15 22:18:29,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:18:29 BoogieIcfgContainer [2023-02-15 22:18:29,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:18:29,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:18:29,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:18:29,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:18:29,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:18:28" (1/3) ... [2023-02-15 22:18:29,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5d335a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:18:29, skipping insertion in model container [2023-02-15 22:18:29,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:18:29" (2/3) ... [2023-02-15 22:18:29,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5d335a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:18:29, skipping insertion in model container [2023-02-15 22:18:29,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:18:29" (3/3) ... [2023-02-15 22:18:29,678 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2023-02-15 22:18:29,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:18:29,689 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-02-15 22:18:29,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:18:29,727 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;@33a667d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:18:29,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-02-15 22:18:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 128 states have internal predecessors, (151), 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) [2023-02-15 22:18:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 22:18:29,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:29,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 22:18:29,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-15 22:18:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:29,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031816790] [2023-02-15 22:18:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:29,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:29,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031816790] [2023-02-15 22:18:29,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031816790] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:29,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:29,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:18:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395479056] [2023-02-15 22:18:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:29,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:18:29,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:18:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:18:29,925 INFO L87 Difference]: Start difference. First operand has 129 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 128 states have internal predecessors, (151), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 22:18:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:30,014 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2023-02-15 22:18:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:18:30,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-02-15 22:18:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:30,022 INFO L225 Difference]: With dead ends: 127 [2023-02-15 22:18:30,022 INFO L226 Difference]: Without dead ends: 125 [2023-02-15 22:18:30,023 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 [2023-02-15 22:18:30,025 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 81 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:30,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 121 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-15 22:18:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-02-15 22:18:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 70 states have (on average 1.9) internal successors, (133), 124 states have internal predecessors, (133), 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) [2023-02-15 22:18:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2023-02-15 22:18:30,055 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 3 [2023-02-15 22:18:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:30,056 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2023-02-15 22:18:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 22:18:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2023-02-15 22:18:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 22:18:30,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:30,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 22:18:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:18:30,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-15 22:18:30,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:30,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778218476] [2023-02-15 22:18:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:30,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:30,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778218476] [2023-02-15 22:18:30,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778218476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:30,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:30,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:18:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780449508] [2023-02-15 22:18:30,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:30,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:18:30,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:18:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:18:30,159 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 22:18:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:30,222 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2023-02-15 22:18:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:18:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-02-15 22:18:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:30,224 INFO L225 Difference]: With dead ends: 123 [2023-02-15 22:18:30,224 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 22:18:30,224 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 [2023-02-15 22:18:30,225 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 79 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:30,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 117 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 22:18:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-02-15 22:18:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 122 states have internal predecessors, (131), 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) [2023-02-15 22:18:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2023-02-15 22:18:30,231 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 3 [2023-02-15 22:18:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:30,232 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2023-02-15 22:18:30,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-02-15 22:18:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2023-02-15 22:18:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:18:30,232 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:30,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:30,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:18:30,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2023-02-15 22:18:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:30,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114035067] [2023-02-15 22:18:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:30,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:30,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:30,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114035067] [2023-02-15 22:18:30,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114035067] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:30,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:30,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:18:30,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684158441] [2023-02-15 22:18:30,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:30,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:18:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:18:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:18:30,354 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-15 22:18:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:30,458 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2023-02-15 22:18:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:18:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 [2023-02-15 22:18:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:30,459 INFO L225 Difference]: With dead ends: 117 [2023-02-15 22:18:30,459 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 22:18:30,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:18:30,461 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:30,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 86 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 22:18:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2023-02-15 22:18:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.6891891891891893) internal successors, (125), 112 states have internal predecessors, (125), 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) [2023-02-15 22:18:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2023-02-15 22:18:30,466 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 8 [2023-02-15 22:18:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:30,467 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2023-02-15 22:18:30,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-15 22:18:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2023-02-15 22:18:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:18:30,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:30,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:30,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 22:18:30,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2023-02-15 22:18:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:30,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806341696] [2023-02-15 22:18:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:30,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:30,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806341696] [2023-02-15 22:18:30,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806341696] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:30,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:30,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:18:30,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542134353] [2023-02-15 22:18:30,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:30,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:18:30,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:30,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:18:30,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:18:30,590 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-02-15 22:18:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:30,769 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2023-02-15 22:18:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:18:30,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 [2023-02-15 22:18:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:30,770 INFO L225 Difference]: With dead ends: 150 [2023-02-15 22:18:30,770 INFO L226 Difference]: Without dead ends: 150 [2023-02-15 22:18:30,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:18:30,771 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 251 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:30,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 154 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:18:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-15 22:18:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2023-02-15 22:18:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 96 states have (on average 1.5729166666666667) internal successors, (151), 134 states have internal predecessors, (151), 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) [2023-02-15 22:18:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2023-02-15 22:18:30,777 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 8 [2023-02-15 22:18:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:30,777 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2023-02-15 22:18:30,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-02-15 22:18:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2023-02-15 22:18:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 22:18:30,778 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:30,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:30,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 22:18:30,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2023-02-15 22:18:30,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:30,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486450946] [2023-02-15 22:18:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:30,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:30,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486450946] [2023-02-15 22:18:30,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486450946] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:30,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:30,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:18:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653938392] [2023-02-15 22:18:30,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:30,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:18:30,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:18:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:18:30,901 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-02-15 22:18:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:31,087 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2023-02-15 22:18:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 22:18:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2023-02-15 22:18:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:31,089 INFO L225 Difference]: With dead ends: 136 [2023-02-15 22:18:31,090 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 22:18:31,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:18:31,097 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 71 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:31,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 230 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:18:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 22:18:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2023-02-15 22:18:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 96 states have (on average 1.5625) internal successors, (150), 133 states have internal predecessors, (150), 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) [2023-02-15 22:18:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2023-02-15 22:18:31,111 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 12 [2023-02-15 22:18:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:31,114 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2023-02-15 22:18:31,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-02-15 22:18:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2023-02-15 22:18:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 22:18:31,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:31,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:31,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 22:18:31,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2023-02-15 22:18:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:31,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597171735] [2023-02-15 22:18:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:31,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:31,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:31,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597171735] [2023-02-15 22:18:31,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597171735] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:31,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:31,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:18:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902229431] [2023-02-15 22:18:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:31,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:18:31,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:18:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:18:31,328 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-02-15 22:18:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:31,528 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2023-02-15 22:18:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 22:18:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2023-02-15 22:18:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:31,530 INFO L225 Difference]: With dead ends: 132 [2023-02-15 22:18:31,530 INFO L226 Difference]: Without dead ends: 132 [2023-02-15 22:18:31,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:18:31,532 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 9 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:31,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-15 22:18:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2023-02-15 22:18:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 91 states have (on average 1.5384615384615385) internal successors, (140), 124 states have internal predecessors, (140), 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) [2023-02-15 22:18:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2023-02-15 22:18:31,540 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 12 [2023-02-15 22:18:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:31,540 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2023-02-15 22:18:31,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-02-15 22:18:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2023-02-15 22:18:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 22:18:31,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:31,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:31,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 22:18:31,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1394377289, now seen corresponding path program 1 times [2023-02-15 22:18:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:31,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690067471] [2023-02-15 22:18:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:31,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:31,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:31,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690067471] [2023-02-15 22:18:31,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690067471] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:31,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:31,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:18:31,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850440487] [2023-02-15 22:18:31,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:31,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:18:31,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:18:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:18:31,571 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-02-15 22:18:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:31,651 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2023-02-15 22:18:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:18:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 [2023-02-15 22:18:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:31,652 INFO L225 Difference]: With dead ends: 140 [2023-02-15 22:18:31,652 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 22:18:31,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:18:31,655 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 126 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:31,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 174 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 22:18:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2023-02-15 22:18:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 124 states have internal predecessors, (137), 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) [2023-02-15 22:18:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2023-02-15 22:18:31,660 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 14 [2023-02-15 22:18:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:31,660 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2023-02-15 22:18:31,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-02-15 22:18:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2023-02-15 22:18:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 22:18:31,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:31,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:31,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 22:18:31,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash -991514342, now seen corresponding path program 1 times [2023-02-15 22:18:31,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:31,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899434632] [2023-02-15 22:18:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:31,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899434632] [2023-02-15 22:18:31,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899434632] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:31,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:31,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:18:31,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22867237] [2023-02-15 22:18:31,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:31,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:18:31,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:18:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:18:31,846 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-02-15 22:18:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:32,006 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2023-02-15 22:18:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 22:18:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 [2023-02-15 22:18:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:32,008 INFO L225 Difference]: With dead ends: 146 [2023-02-15 22:18:32,008 INFO L226 Difference]: Without dead ends: 146 [2023-02-15 22:18:32,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:18:32,009 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 30 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:32,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 399 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-15 22:18:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2023-02-15 22:18:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 99 states have (on average 1.4747474747474747) internal successors, (146), 132 states have internal predecessors, (146), 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) [2023-02-15 22:18:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2023-02-15 22:18:32,014 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 17 [2023-02-15 22:18:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:32,014 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2023-02-15 22:18:32,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-02-15 22:18:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2023-02-15 22:18:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 22:18:32,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:32,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:32,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 22:18:32,016 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1632793422, now seen corresponding path program 1 times [2023-02-15 22:18:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:32,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509469183] [2023-02-15 22:18:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:32,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:32,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:32,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509469183] [2023-02-15 22:18:32,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509469183] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:32,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:32,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:18:32,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907447876] [2023-02-15 22:18:32,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:32,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:18:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:18:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:18:32,163 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2023-02-15 22:18:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:32,319 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2023-02-15 22:18:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:18:32,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 19 [2023-02-15 22:18:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:32,320 INFO L225 Difference]: With dead ends: 152 [2023-02-15 22:18:32,321 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 22:18:32,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:18:32,323 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 25 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:32,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 287 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 22:18:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2023-02-15 22:18:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 142 states have internal predecessors, (159), 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) [2023-02-15 22:18:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2023-02-15 22:18:32,325 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 19 [2023-02-15 22:18:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:32,326 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2023-02-15 22:18:32,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2023-02-15 22:18:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2023-02-15 22:18:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 22:18:32,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:32,326 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, 1, 1] [2023-02-15 22:18:32,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 22:18:32,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1777521809, now seen corresponding path program 1 times [2023-02-15 22:18:32,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864124556] [2023-02-15 22:18:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:32,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:32,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:32,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864124556] [2023-02-15 22:18:32,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864124556] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:32,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:32,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:18:32,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544955993] [2023-02-15 22:18:32,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:32,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:18:32,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:32,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:18:32,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:18:32,408 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:18:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:32,581 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2023-02-15 22:18:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:18:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 22:18:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:32,582 INFO L225 Difference]: With dead ends: 144 [2023-02-15 22:18:32,582 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 22:18:32,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:18:32,583 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 68 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:32,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 227 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 22:18:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2023-02-15 22:18:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 109 states have (on average 1.4495412844036697) internal successors, (158), 141 states have internal predecessors, (158), 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) [2023-02-15 22:18:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2023-02-15 22:18:32,588 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 22 [2023-02-15 22:18:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:32,588 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2023-02-15 22:18:32,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:18:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2023-02-15 22:18:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 22:18:32,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:32,590 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, 1, 1] [2023-02-15 22:18:32,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 22:18:32,590 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1777521810, now seen corresponding path program 1 times [2023-02-15 22:18:32,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:32,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046961768] [2023-02-15 22:18:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:32,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046961768] [2023-02-15 22:18:32,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046961768] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:18:32,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:18:32,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:18:32,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716590103] [2023-02-15 22:18:32,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:18:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:18:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:18:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:18:32,726 INFO L87 Difference]: Start difference. First operand 142 states and 158 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:18:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:32,881 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2023-02-15 22:18:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:18:32,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 22:18:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:32,882 INFO L225 Difference]: With dead ends: 141 [2023-02-15 22:18:32,882 INFO L226 Difference]: Without dead ends: 141 [2023-02-15 22:18:32,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:18:32,884 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 6 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:32,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 296 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:18:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-15 22:18:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-02-15 22:18:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 109 states have (on average 1.4311926605504588) internal successors, (156), 139 states have internal predecessors, (156), 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) [2023-02-15 22:18:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2023-02-15 22:18:32,894 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 22 [2023-02-15 22:18:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:32,894 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2023-02-15 22:18:32,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:18:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2023-02-15 22:18:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 22:18:32,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:32,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:32,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 22:18:32,895 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:32,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1310880280, now seen corresponding path program 1 times [2023-02-15 22:18:32,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:32,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484584059] [2023-02-15 22:18:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:32,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:33,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484584059] [2023-02-15 22:18:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484584059] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:18:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797979912] [2023-02-15 22:18:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:33,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:18:33,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:18:33,163 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) [2023-02-15 22:18:33,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 22:18:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:33,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 22:18:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:18:33,319 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:18:33,392 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:18:33,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:18:33,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:18:33,538 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:33,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-02-15 22:18:33,600 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:33,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-02-15 22:18:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:33,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 22:18:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:33,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:18:33,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:33,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-02-15 22:18:33,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:33,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-02-15 22:18:33,996 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 11 treesize of output 9 [2023-02-15 22:18:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:38,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797979912] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:18:38,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:18:38,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2023-02-15 22:18:38,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186659453] [2023-02-15 22:18:38,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:18:38,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 22:18:38,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 22:18:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=788, Unknown=4, NotChecked=0, Total=930 [2023-02-15 22:18:38,301 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 31 states have internal predecessors, (65), 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) [2023-02-15 22:18:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:41,269 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2023-02-15 22:18:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 22:18:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 31 states have internal predecessors, (65), 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 25 [2023-02-15 22:18:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:41,272 INFO L225 Difference]: With dead ends: 258 [2023-02-15 22:18:41,272 INFO L226 Difference]: Without dead ends: 258 [2023-02-15 22:18:41,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=278, Invalid=1200, Unknown=4, NotChecked=0, Total=1482 [2023-02-15 22:18:41,272 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 632 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:41,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 739 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 22:18:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-15 22:18:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 158. [2023-02-15 22:18:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 127 states have (on average 1.4015748031496063) internal successors, (178), 157 states have internal predecessors, (178), 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) [2023-02-15 22:18:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2023-02-15 22:18:41,276 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 25 [2023-02-15 22:18:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:41,277 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2023-02-15 22:18:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 31 states have internal predecessors, (65), 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) [2023-02-15 22:18:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2023-02-15 22:18:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 22:18:41,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:41,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:41,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 22:18:41,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 22:18:41,483 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1310880279, now seen corresponding path program 1 times [2023-02-15 22:18:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:41,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384131453] [2023-02-15 22:18:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:41,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384131453] [2023-02-15 22:18:41,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384131453] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:18:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525142487] [2023-02-15 22:18:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:41,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:18:41,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:18:41,811 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) [2023-02-15 22:18:41,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 22:18:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 22:18:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:18:41,897 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:18:41,946 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:18:41,957 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:18:41,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:18:41,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:18:41,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:18:42,113 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:18:42,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-15 22:18:42,118 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 5 treesize of output 3 [2023-02-15 22:18:42,134 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:42,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-02-15 22:18:42,173 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:42,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2023-02-15 22:18:42,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 22:18:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:42,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 22:18:42,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:42,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:18:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:42,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:18:43,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:43,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-02-15 22:18:43,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:43,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-02-15 22:18:43,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:43,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2023-02-15 22:18:43,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:43,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2023-02-15 22:18:43,044 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 66 treesize of output 62 [2023-02-15 22:18:43,049 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 32 treesize of output 28 [2023-02-15 22:18:43,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:43,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-02-15 22:18:43,124 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:43,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:43,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:43,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-02-15 22:18:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:43,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525142487] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:18:43,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:18:43,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-02-15 22:18:43,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209837112] [2023-02-15 22:18:43,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:18:43,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 22:18:43,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 22:18:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1011, Unknown=3, NotChecked=0, Total=1122 [2023-02-15 22:18:43,330 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 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) [2023-02-15 22:18:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:44,890 INFO L93 Difference]: Finished difference Result 260 states and 289 transitions. [2023-02-15 22:18:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 22:18:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 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) Word has length 25 [2023-02-15 22:18:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:44,891 INFO L225 Difference]: With dead ends: 260 [2023-02-15 22:18:44,891 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 22:18:44,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=414, Invalid=2235, Unknown=3, NotChecked=0, Total=2652 [2023-02-15 22:18:44,892 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 897 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:44,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 1173 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 22:18:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 22:18:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2023-02-15 22:18:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 132 states have (on average 1.3863636363636365) internal successors, (183), 157 states have internal predecessors, (183), 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) [2023-02-15 22:18:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2023-02-15 22:18:44,895 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 25 [2023-02-15 22:18:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:44,896 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2023-02-15 22:18:44,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 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) [2023-02-15 22:18:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2023-02-15 22:18:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 22:18:44,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:44,897 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:44,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 22:18:45,097 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,SelfDestructingSolverStorable12 [2023-02-15 22:18:45,097 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash 14127102, now seen corresponding path program 1 times [2023-02-15 22:18:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:45,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042923429] [2023-02-15 22:18:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042923429] [2023-02-15 22:18:45,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042923429] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:18:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204316973] [2023-02-15 22:18:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:45,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:18:45,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:18:45,300 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) [2023-02-15 22:18:45,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 22:18:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:45,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 22:18:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:18:45,379 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:18:45,436 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:18:45,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:18:45,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:18:45,545 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:45,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-02-15 22:18:45,576 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:45,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-02-15 22:18:45,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:45,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-02-15 22:18:45,726 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:45,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 22:18:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:45,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:18:46,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:46,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-02-15 22:18:46,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:46,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-02-15 22:18:46,197 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 11 treesize of output 9 [2023-02-15 22:18:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:50,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204316973] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:18:50,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:18:50,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-02-15 22:18:50,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732348664] [2023-02-15 22:18:50,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:18:50,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 22:18:50,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:50,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 22:18:50,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=688, Unknown=4, NotChecked=0, Total=812 [2023-02-15 22:18:50,524 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 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) [2023-02-15 22:18:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:55,278 INFO L93 Difference]: Finished difference Result 225 states and 256 transitions. [2023-02-15 22:18:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 22:18:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 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 27 [2023-02-15 22:18:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:55,280 INFO L225 Difference]: With dead ends: 225 [2023-02-15 22:18:55,280 INFO L226 Difference]: Without dead ends: 225 [2023-02-15 22:18:55,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=224, Invalid=1032, Unknown=4, NotChecked=0, Total=1260 [2023-02-15 22:18:55,281 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 274 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:55,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 746 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 22:18:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-15 22:18:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 165. [2023-02-15 22:18:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 139 states have (on average 1.381294964028777) internal successors, (192), 164 states have internal predecessors, (192), 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) [2023-02-15 22:18:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2023-02-15 22:18:55,283 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 27 [2023-02-15 22:18:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:55,284 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2023-02-15 22:18:55,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 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) [2023-02-15 22:18:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2023-02-15 22:18:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 22:18:55,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:55,288 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:55,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 22:18:55,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:18:55,493 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 14127103, now seen corresponding path program 1 times [2023-02-15 22:18:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:55,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127863474] [2023-02-15 22:18:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:55,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:55,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:55,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127863474] [2023-02-15 22:18:55,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127863474] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:18:55,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360534281] [2023-02-15 22:18:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:55,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:18:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:18:55,783 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) [2023-02-15 22:18:55,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 22:18:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 22:18:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:18:55,883 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:18:55,945 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:18:55,955 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:18:55,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:18:55,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:18:55,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:18:56,079 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:56,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-02-15 22:18:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:56,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 22:18:56,099 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:18:56,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2023-02-15 22:18:56,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 22:18:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:56,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-02-15 22:18:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:56,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 22:18:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:56,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 22:18:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:56,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:18:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:56,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:18:56,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:56,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-02-15 22:18:56,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:56,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-02-15 22:18:56,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:56,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2023-02-15 22:18:56,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:56,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2023-02-15 22:18:56,770 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 34 treesize of output 30 [2023-02-15 22:18:56,774 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 62 treesize of output 58 [2023-02-15 22:18:56,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:18:56,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-02-15 22:18:56,831 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:18:56,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:18:56,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-02-15 22:18:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:18:57,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360534281] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:18:57,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:18:57,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-02-15 22:18:57,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199749530] [2023-02-15 22:18:57,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:18:57,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 22:18:57,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:57,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 22:18:57,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=828, Unknown=3, NotChecked=0, Total=930 [2023-02-15 22:18:57,062 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 states have internal predecessors, (79), 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) [2023-02-15 22:18:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:58,284 INFO L93 Difference]: Finished difference Result 229 states and 260 transitions. [2023-02-15 22:18:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 22:18:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 states have internal predecessors, (79), 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 27 [2023-02-15 22:18:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:58,285 INFO L225 Difference]: With dead ends: 229 [2023-02-15 22:18:58,285 INFO L226 Difference]: Without dead ends: 229 [2023-02-15 22:18:58,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1384, Unknown=3, NotChecked=0, Total=1640 [2023-02-15 22:18:58,288 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 521 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:58,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 941 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 22:18:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-02-15 22:18:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 165. [2023-02-15 22:18:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 139 states have (on average 1.3741007194244603) internal successors, (191), 164 states have internal predecessors, (191), 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) [2023-02-15 22:18:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2023-02-15 22:18:58,297 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 27 [2023-02-15 22:18:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:58,297 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2023-02-15 22:18:58,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 states have internal predecessors, (79), 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) [2023-02-15 22:18:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2023-02-15 22:18:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 22:18:58,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:58,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:58,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 22:18:58,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 22:18:58,506 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 408081261, now seen corresponding path program 1 times [2023-02-15 22:18:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:58,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180454635] [2023-02-15 22:18:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:58,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:18:58,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:18:58,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180454635] [2023-02-15 22:18:58,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180454635] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:18:58,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828368766] [2023-02-15 22:18:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:58,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:18:58,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:18:58,669 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) [2023-02-15 22:18:58,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 22:18:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:18:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 22:18:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:18:58,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 22:18:58,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-15 22:18:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:18:58,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:18:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:18:59,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828368766] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:18:59,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:18:59,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-02-15 22:18:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236408911] [2023-02-15 22:18:59,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:18:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 22:18:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:18:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 22:18:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-15 22:18:59,032 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 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) [2023-02-15 22:18:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:18:59,559 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2023-02-15 22:18:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 22:18:59,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 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 30 [2023-02-15 22:18:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:18:59,560 INFO L225 Difference]: With dead ends: 173 [2023-02-15 22:18:59,560 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 22:18:59,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2023-02-15 22:18:59,561 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 344 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:18:59,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 252 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 22:18:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 22:18:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 153. [2023-02-15 22:18:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 129 states have (on average 1.3488372093023255) internal successors, (174), 152 states have internal predecessors, (174), 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) [2023-02-15 22:18:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2023-02-15 22:18:59,563 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 30 [2023-02-15 22:18:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:18:59,563 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2023-02-15 22:18:59,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 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) [2023-02-15 22:18:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2023-02-15 22:18:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 22:18:59,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:18:59,564 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:18:59,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 22:18:59,764 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,SelfDestructingSolverStorable15 [2023-02-15 22:18:59,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:18:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:18:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2056569881, now seen corresponding path program 1 times [2023-02-15 22:18:59,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:18:59,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974141808] [2023-02-15 22:18:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:18:59,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:18:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:19:00,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974141808] [2023-02-15 22:19:00,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974141808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:19:00,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059891900] [2023-02-15 22:19:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:00,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:00,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:19:00,204 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) [2023-02-15 22:19:00,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 22:19:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 22:19:00,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:19:00,422 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:19:00,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:19:00,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:19:00,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:19:00,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:19:00,596 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:19:00,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-02-15 22:19:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:19:00,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 22:19:00,624 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:19:00,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2023-02-15 22:19:00,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 22:19:00,710 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:00,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 22:19:00,714 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:00,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:19:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:00,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:19:01,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:01,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-02-15 22:19:01,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:01,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2023-02-15 22:19:01,253 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 9 treesize of output 7 [2023-02-15 22:19:01,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:01,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-02-15 22:19:01,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:01,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-02-15 22:19:01,293 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:01,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:19:01,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:19:01,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-02-15 22:19:01,299 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:01,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:19:01,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:19:01,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-02-15 22:19:01,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:01,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 129 [2023-02-15 22:19:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:02,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059891900] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:19:02,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:19:02,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2023-02-15 22:19:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102858180] [2023-02-15 22:19:02,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:19:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 22:19:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:19:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 22:19:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1130, Unknown=12, NotChecked=0, Total=1260 [2023-02-15 22:19:02,053 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 36 states have internal predecessors, (85), 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) [2023-02-15 22:19:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:19:03,607 INFO L93 Difference]: Finished difference Result 267 states and 295 transitions. [2023-02-15 22:19:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 22:19:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 36 states have internal predecessors, (85), 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 31 [2023-02-15 22:19:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:19:03,608 INFO L225 Difference]: With dead ends: 267 [2023-02-15 22:19:03,608 INFO L226 Difference]: Without dead ends: 267 [2023-02-15 22:19:03,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=448, Invalid=2620, Unknown=12, NotChecked=0, Total=3080 [2023-02-15 22:19:03,610 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 525 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:19:03,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 881 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 22:19:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-15 22:19:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 182. [2023-02-15 22:19:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 158 states have (on average 1.3164556962025316) internal successors, (208), 181 states have internal predecessors, (208), 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) [2023-02-15 22:19:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 208 transitions. [2023-02-15 22:19:03,612 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 208 transitions. Word has length 31 [2023-02-15 22:19:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:19:03,612 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 208 transitions. [2023-02-15 22:19:03,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 36 states have internal predecessors, (85), 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) [2023-02-15 22:19:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 208 transitions. [2023-02-15 22:19:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 22:19:03,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:19:03,614 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:19:03,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 22:19:03,819 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,SelfDestructingSolverStorable16 [2023-02-15 22:19:03,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:19:03,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:19:03,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2056569880, now seen corresponding path program 1 times [2023-02-15 22:19:03,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:19:03,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594993823] [2023-02-15 22:19:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:03,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:19:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:04,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:19:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594993823] [2023-02-15 22:19:04,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594993823] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:19:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119246850] [2023-02-15 22:19:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:04,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:04,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:19:04,053 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) [2023-02-15 22:19:04,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 22:19:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 22:19:04,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:19:04,289 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:19:04,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:19:04,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:19:04,433 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:19:04,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-02-15 22:19:04,468 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:19:04,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-02-15 22:19:04,544 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:04,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 22:19:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:04,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:19:06,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:06,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-02-15 22:19:06,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:06,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-02-15 22:19:06,909 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 11 treesize of output 9 [2023-02-15 22:19:09,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:09,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 381 [2023-02-15 22:19:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:13,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119246850] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:19:13,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:19:13,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2023-02-15 22:19:13,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240938704] [2023-02-15 22:19:13,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:19:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 22:19:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:19:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 22:19:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=916, Unknown=6, NotChecked=0, Total=1056 [2023-02-15 22:19:13,025 INFO L87 Difference]: Start difference. First operand 182 states and 208 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 33 states have internal predecessors, (80), 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) [2023-02-15 22:19:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:19:14,277 INFO L93 Difference]: Finished difference Result 255 states and 285 transitions. [2023-02-15 22:19:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 22:19:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 33 states have internal predecessors, (80), 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 31 [2023-02-15 22:19:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:19:14,278 INFO L225 Difference]: With dead ends: 255 [2023-02-15 22:19:14,278 INFO L226 Difference]: Without dead ends: 255 [2023-02-15 22:19:14,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=377, Invalid=1779, Unknown=6, NotChecked=0, Total=2162 [2023-02-15 22:19:14,279 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 334 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:19:14,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 840 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 22:19:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-02-15 22:19:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2023-02-15 22:19:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 157 states have (on average 1.3121019108280254) internal successors, (206), 180 states have internal predecessors, (206), 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) [2023-02-15 22:19:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2023-02-15 22:19:14,282 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 31 [2023-02-15 22:19:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:19:14,282 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2023-02-15 22:19:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 33 states have internal predecessors, (80), 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) [2023-02-15 22:19:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2023-02-15 22:19:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 22:19:14,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:19:14,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:19:14,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 22:19:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:14,483 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:19:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:19:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash 678653734, now seen corresponding path program 1 times [2023-02-15 22:19:14,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:19:14,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776907093] [2023-02-15 22:19:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:19:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:14,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:19:14,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776907093] [2023-02-15 22:19:14,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776907093] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:19:14,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461887135] [2023-02-15 22:19:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:14,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:14,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:19:14,569 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) [2023-02-15 22:19:14,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 22:19:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:14,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 22:19:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:19:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:14,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:19:14,736 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 22:19:14,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 22:19:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:14,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461887135] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:19:14,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:19:14,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-02-15 22:19:14,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173593898] [2023-02-15 22:19:14,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:19:14,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:19:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:19:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:19:14,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:19:14,758 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 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) [2023-02-15 22:19:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:19:14,916 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2023-02-15 22:19:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:19:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 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 33 [2023-02-15 22:19:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:19:14,917 INFO L225 Difference]: With dead ends: 238 [2023-02-15 22:19:14,917 INFO L226 Difference]: Without dead ends: 238 [2023-02-15 22:19:14,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:19:14,918 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 442 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:19:14,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 105 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:19:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-15 22:19:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2023-02-15 22:19:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 183 states have internal predecessors, (213), 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) [2023-02-15 22:19:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2023-02-15 22:19:14,920 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 33 [2023-02-15 22:19:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:19:14,920 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2023-02-15 22:19:14,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 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) [2023-02-15 22:19:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2023-02-15 22:19:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 22:19:14,921 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:19:14,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:19:14,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 22:19:15,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:15,126 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:19:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:19:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 678653735, now seen corresponding path program 1 times [2023-02-15 22:19:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:19:15,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116627996] [2023-02-15 22:19:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:15,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:19:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:19:15,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116627996] [2023-02-15 22:19:15,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116627996] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:19:15,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445491324] [2023-02-15 22:19:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:15,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:19:15,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:19:15,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 22:19:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:15,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 22:19:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:19:15,649 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:19:15,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:19:15,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:19:15,771 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:19:15,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-02-15 22:19:15,802 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:19:15,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-02-15 22:19:15,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:15,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:15,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-02-15 22:19:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:19:15,955 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_108| Int) (v_ArrVal_972 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_108|)) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_108| |c_ULTIMATE.start_main_~head~0#1.offset|)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_972) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_108|))))) is different from false [2023-02-15 22:19:16,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:16,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-02-15 22:19:16,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:16,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-02-15 22:19:16,076 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 20 treesize of output 18 [2023-02-15 22:19:16,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:16,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 141 [2023-02-15 22:19:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:16,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445491324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:19:16,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:19:16,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2023-02-15 22:19:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786261501] [2023-02-15 22:19:16,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:19:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 22:19:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:19:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 22:19:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=703, Unknown=11, NotChecked=54, Total=870 [2023-02-15 22:19:16,868 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 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) [2023-02-15 22:19:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:19:18,686 INFO L93 Difference]: Finished difference Result 301 states and 341 transitions. [2023-02-15 22:19:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 22:19:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 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 33 [2023-02-15 22:19:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:19:18,687 INFO L225 Difference]: With dead ends: 301 [2023-02-15 22:19:18,687 INFO L226 Difference]: Without dead ends: 301 [2023-02-15 22:19:18,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=457, Invalid=2292, Unknown=11, NotChecked=102, Total=2862 [2023-02-15 22:19:18,688 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 576 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 22:19:18,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1103 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1700 Invalid, 0 Unknown, 181 Unchecked, 0.9s Time] [2023-02-15 22:19:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-02-15 22:19:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 203. [2023-02-15 22:19:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 180 states have (on average 1.3222222222222222) internal successors, (238), 202 states have internal predecessors, (238), 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) [2023-02-15 22:19:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2023-02-15 22:19:18,691 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 33 [2023-02-15 22:19:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:19:18,691 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2023-02-15 22:19:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 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) [2023-02-15 22:19:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2023-02-15 22:19:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 22:19:18,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:19:18,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:19:18,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 22:19:18,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:18,892 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 22:19:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:19:18,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1865212554, now seen corresponding path program 2 times [2023-02-15 22:19:18,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:19:18,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72320463] [2023-02-15 22:19:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:19:18,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:19:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:19:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:19,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:19:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72320463] [2023-02-15 22:19:19,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72320463] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:19:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405719627] [2023-02-15 22:19:19,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:19:19,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:19:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:19:19,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:19:19,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 22:19:19,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:19:19,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:19:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 22:19:19,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:19:19,318 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:19:19,371 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:19:19,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:19:19,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:19:19,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:19:19,488 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-15 22:19:19,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-02-15 22:19:19,500 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 22:19:19,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-02-15 22:19:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:19:19,537 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 22:19:19,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2023-02-15 22:19:19,546 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-02-15 22:19:19,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2023-02-15 22:19:19,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:19,806 INFO L321 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2023-02-15 22:19:19,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 38 [2023-02-15 22:19:19,809 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:19:19,812 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 22:19:19,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 22:19:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:19:19,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:19:29,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:19:29,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 105759 treesize of output 94403 [2023-02-15 22:19:32,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136954 treesize of output 135898