./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 3dbbec33 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-?-3dbbec3 [2023-02-14 13:45:26,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:45:26,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:45:26,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:45:26,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:45:26,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:45:26,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:45:26,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:45:26,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:45:26,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:45:26,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:45:26,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:45:26,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:45:26,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:45:26,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:45:26,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:45:26,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:45:26,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:45:26,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:45:26,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:45:26,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:45:26,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:45:26,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:45:26,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:45:26,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:45:26,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:45:26,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:45:26,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:45:26,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:45:26,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:45:26,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:45:26,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:45:26,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:45:26,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:45:26,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:45:26,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:45:26,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:45:26,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:45:26,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:45:27,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:45:27,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:45:27,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 13:45:27,020 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:45:27,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:45:27,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:45:27,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:45:27,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:45:27,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:45:27,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:45:27,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:45:27,022 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:45:27,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:45:27,023 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:45:27,023 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 13:45:27,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:45:27,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:45:27,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:45:27,023 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 13:45:27,024 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 13:45:27,024 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 13:45:27,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:45:27,024 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 13:45:27,024 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:45:27,024 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:45:27,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:45:27,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:45:27,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:45:27,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:45:27,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:45:27,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:45:27,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:45:27,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:45:27,026 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:45:27,026 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:45:27,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:45:27,027 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:45:27,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba [2023-02-14 13:45:27,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:45:27,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:45:27,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:45:27,261 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:45:27,262 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:45:27,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2023-02-14 13:45:28,364 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:45:28,612 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:45:28,612 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2023-02-14 13:45:28,624 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17467ee91/a3b92387d46e4acc937e2d46c5d1b66b/FLAGf383d916c [2023-02-14 13:45:28,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17467ee91/a3b92387d46e4acc937e2d46c5d1b66b [2023-02-14 13:45:28,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:45:28,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:45:28,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:45:28,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:45:28,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:45:28,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:45:28" (1/1) ... [2023-02-14 13:45:28,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a3d874e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:28, skipping insertion in model container [2023-02-14 13:45:28,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:45:28" (1/1) ... [2023-02-14 13:45:28,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:45:28,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:45:28,909 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] [2023-02-14 13:45:28,915 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] [2023-02-14 13:45:28,930 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] [2023-02-14 13:45:28,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:45:28,948 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:45:28,999 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] [2023-02-14 13:45:29,000 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] [2023-02-14 13:45:29,004 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] [2023-02-14 13:45:29,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:45:29,032 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:45:29,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29 WrapperNode [2023-02-14 13:45:29,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:45:29,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:45:29,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:45:29,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:45:29,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,090 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 139 [2023-02-14 13:45:29,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:45:29,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:45:29,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:45:29,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:45:29,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,126 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:45:29,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:45:29,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:45:29,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:45:29,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (1/1) ... [2023-02-14 13:45:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:45:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:45:29,175 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) [2023-02-14 13:45:29,196 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 [2023-02-14 13:45:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 13:45:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 13:45:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 13:45:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:45:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 13:45:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 13:45:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 13:45:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:45:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:45:29,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:45:29,318 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:45:29,320 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:45:29,728 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:45:29,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:45:29,735 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-14 13:45:29,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:45:29 BoogieIcfgContainer [2023-02-14 13:45:29,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:45:29,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:45:29,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:45:29,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:45:29,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:45:28" (1/3) ... [2023-02-14 13:45:29,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@932a343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:45:29, skipping insertion in model container [2023-02-14 13:45:29,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:45:29" (2/3) ... [2023-02-14 13:45:29,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@932a343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:45:29, skipping insertion in model container [2023-02-14 13:45:29,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:45:29" (3/3) ... [2023-02-14 13:45:29,745 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2023-02-14 13:45:29,760 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:45:29,761 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-02-14 13:45:29,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:45:29,808 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;@126f7a0c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:45:29,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-02-14 13:45:29,811 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) [2023-02-14 13:45:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-14 13:45:29,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:29,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-14 13:45:29,816 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)] === [2023-02-14 13:45:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-14 13:45:29,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:29,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760528247] [2023-02-14 13:45:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:29,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:29,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:29,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760528247] [2023-02-14 13:45:29,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760528247] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:29,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:29,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:45:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087656232] [2023-02-14 13:45:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:29,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:45:29,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:45:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:45:30,010 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) [2023-02-14 13:45:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:30,104 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2023-02-14 13:45:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:45:30,107 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 [2023-02-14 13:45:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:30,114 INFO L225 Difference]: With dead ends: 127 [2023-02-14 13:45:30,114 INFO L226 Difference]: Without dead ends: 125 [2023-02-14 13:45:30,115 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 [2023-02-14 13:45:30,118 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 [2023-02-14 13:45:30,119 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] [2023-02-14 13:45:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-14 13:45:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-02-14 13:45:30,147 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) [2023-02-14 13:45:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2023-02-14 13:45:30,150 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 3 [2023-02-14 13:45:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:30,150 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2023-02-14 13:45:30,150 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) [2023-02-14 13:45:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2023-02-14 13:45:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-14 13:45:30,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:30,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-14 13:45:30,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:45:30,151 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)] === [2023-02-14 13:45:30,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-14 13:45:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:30,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995050776] [2023-02-14 13:45:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:30,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:30,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995050776] [2023-02-14 13:45:30,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995050776] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:30,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:30,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:45:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158427922] [2023-02-14 13:45:30,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:30,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:45:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:45:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:45:30,232 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) [2023-02-14 13:45:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:30,309 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2023-02-14 13:45:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:45:30,310 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 [2023-02-14 13:45:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:30,311 INFO L225 Difference]: With dead ends: 123 [2023-02-14 13:45:30,311 INFO L226 Difference]: Without dead ends: 123 [2023-02-14 13:45:30,312 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 [2023-02-14 13:45:30,313 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 79 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-14 13:45:30,314 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] [2023-02-14 13:45:30,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-14 13:45:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-02-14 13:45:30,320 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) [2023-02-14 13:45:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2023-02-14 13:45:30,322 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 3 [2023-02-14 13:45:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:30,322 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2023-02-14 13:45:30,322 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) [2023-02-14 13:45:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2023-02-14 13:45:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 13:45:30,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:30,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:45:30,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 13:45:30,326 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)] === [2023-02-14 13:45:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2023-02-14 13:45:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:30,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414432276] [2023-02-14 13:45:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:30,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:30,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414432276] [2023-02-14 13:45:30,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414432276] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:30,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:30,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 13:45:30,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846992151] [2023-02-14 13:45:30,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:30,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:45:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:30,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:45:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:45:30,514 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) [2023-02-14 13:45:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:30,664 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2023-02-14 13:45:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:45:30,665 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 [2023-02-14 13:45:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:30,668 INFO L225 Difference]: With dead ends: 117 [2023-02-14 13:45:30,668 INFO L226 Difference]: Without dead ends: 117 [2023-02-14 13:45:30,668 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 [2023-02-14 13:45:30,672 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 [2023-02-14 13:45:30,674 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] [2023-02-14 13:45:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-14 13:45:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2023-02-14 13:45:30,687 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) [2023-02-14 13:45:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2023-02-14 13:45:30,688 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 8 [2023-02-14 13:45:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:30,688 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2023-02-14 13:45:30,688 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) [2023-02-14 13:45:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2023-02-14 13:45:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 13:45:30,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:30,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:45:30,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 13:45:30,689 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)] === [2023-02-14 13:45:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2023-02-14 13:45:30,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:30,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432626716] [2023-02-14 13:45:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:30,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:30,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:30,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432626716] [2023-02-14 13:45:30,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432626716] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:30,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:30,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 13:45:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042389780] [2023-02-14 13:45:30,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:45:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:45:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:45:30,888 INFO L87 Difference]: Start difference. First operand 113 states and 125 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) [2023-02-14 13:45:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:31,063 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2023-02-14 13:45:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:45:31,064 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 [2023-02-14 13:45:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:31,065 INFO L225 Difference]: With dead ends: 150 [2023-02-14 13:45:31,065 INFO L226 Difference]: Without dead ends: 150 [2023-02-14 13:45:31,068 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 [2023-02-14 13:45:31,071 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:45:31,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 129 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:45:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-14 13:45:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2023-02-14 13:45:31,075 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) [2023-02-14 13:45:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2023-02-14 13:45:31,080 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 8 [2023-02-14 13:45:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:31,080 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2023-02-14 13:45:31,081 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) [2023-02-14 13:45:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2023-02-14 13:45:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 13:45:31,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:31,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:45:31,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 13:45:31,082 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)] === [2023-02-14 13:45:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2023-02-14 13:45:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:31,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796941977] [2023-02-14 13:45:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:31,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:31,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796941977] [2023-02-14 13:45:31,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796941977] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:31,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:31,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:45:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206499616] [2023-02-14 13:45:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:31,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:45:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:45:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:45:31,197 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) [2023-02-14 13:45:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:31,398 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2023-02-14 13:45:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 13:45:31,399 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 [2023-02-14 13:45:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:31,400 INFO L225 Difference]: With dead ends: 136 [2023-02-14 13:45:31,401 INFO L226 Difference]: Without dead ends: 136 [2023-02-14 13:45:31,403 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 [2023-02-14 13:45:31,406 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 [2023-02-14 13:45:31,406 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] [2023-02-14 13:45:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-14 13:45:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2023-02-14 13:45:31,419 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) [2023-02-14 13:45:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2023-02-14 13:45:31,420 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 12 [2023-02-14 13:45:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:31,421 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2023-02-14 13:45:31,421 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) [2023-02-14 13:45:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2023-02-14 13:45:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 13:45:31,422 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:31,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:45:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 13:45:31,423 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)] === [2023-02-14 13:45:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2023-02-14 13:45:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:31,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235056731] [2023-02-14 13:45:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:31,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235056731] [2023-02-14 13:45:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235056731] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:31,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:31,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:45:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181412150] [2023-02-14 13:45:31,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:31,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:45:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:31,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:45:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:45:31,615 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) [2023-02-14 13:45:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:31,840 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2023-02-14 13:45:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:45:31,840 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 [2023-02-14 13:45:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:31,841 INFO L225 Difference]: With dead ends: 132 [2023-02-14 13:45:31,841 INFO L226 Difference]: Without dead ends: 132 [2023-02-14 13:45:31,842 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 [2023-02-14 13:45:31,842 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:45:31,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:45:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-14 13:45:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2023-02-14 13:45:31,852 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) [2023-02-14 13:45:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2023-02-14 13:45:31,853 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 12 [2023-02-14 13:45:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:31,853 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2023-02-14 13:45:31,853 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) [2023-02-14 13:45:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2023-02-14 13:45:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 13:45:31,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:31,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:45:31,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 13:45:31,854 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)] === [2023-02-14 13:45:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1394377289, now seen corresponding path program 1 times [2023-02-14 13:45:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:31,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286346057] [2023-02-14 13:45:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:31,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:31,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286346057] [2023-02-14 13:45:31,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286346057] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:31,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:31,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:45:31,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155063652] [2023-02-14 13:45:31,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:31,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:45:31,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:45:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:45:31,922 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) [2023-02-14 13:45:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:32,017 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2023-02-14 13:45:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:45:32,017 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 [2023-02-14 13:45:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:32,018 INFO L225 Difference]: With dead ends: 140 [2023-02-14 13:45:32,018 INFO L226 Difference]: Without dead ends: 140 [2023-02-14 13:45:32,018 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 [2023-02-14 13:45:32,019 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 [2023-02-14 13:45:32,019 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] [2023-02-14 13:45:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-14 13:45:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2023-02-14 13:45:32,022 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) [2023-02-14 13:45:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2023-02-14 13:45:32,023 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 14 [2023-02-14 13:45:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:32,023 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2023-02-14 13:45:32,023 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) [2023-02-14 13:45:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2023-02-14 13:45:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 13:45:32,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:32,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:45:32,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 13:45:32,025 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)] === [2023-02-14 13:45:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -991514342, now seen corresponding path program 1 times [2023-02-14 13:45:32,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:32,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104753984] [2023-02-14 13:45:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:32,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:32,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104753984] [2023-02-14 13:45:32,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104753984] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:32,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:32,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:45:32,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841996621] [2023-02-14 13:45:32,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:32,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:45:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:32,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:45:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:45:32,207 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) [2023-02-14 13:45:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:32,366 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2023-02-14 13:45:32,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 13:45:32,369 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 [2023-02-14 13:45:32,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:32,369 INFO L225 Difference]: With dead ends: 146 [2023-02-14 13:45:32,369 INFO L226 Difference]: Without dead ends: 146 [2023-02-14 13:45:32,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-14 13:45:32,370 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 [2023-02-14 13:45:32,371 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] [2023-02-14 13:45:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-14 13:45:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2023-02-14 13:45:32,376 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) [2023-02-14 13:45:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2023-02-14 13:45:32,376 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 17 [2023-02-14 13:45:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:32,377 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2023-02-14 13:45:32,377 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) [2023-02-14 13:45:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2023-02-14 13:45:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 13:45:32,378 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:32,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:45:32,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 13:45:32,378 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)] === [2023-02-14 13:45:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1632793422, now seen corresponding path program 1 times [2023-02-14 13:45:32,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:32,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536704085] [2023-02-14 13:45:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:32,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:32,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536704085] [2023-02-14 13:45:32,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536704085] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:32,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:32,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:45:32,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489029444] [2023-02-14 13:45:32,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:32,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:45:32,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:32,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:45:32,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:45:32,547 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) [2023-02-14 13:45:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:32,720 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2023-02-14 13:45:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:45:32,721 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 [2023-02-14 13:45:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:32,722 INFO L225 Difference]: With dead ends: 152 [2023-02-14 13:45:32,722 INFO L226 Difference]: Without dead ends: 152 [2023-02-14 13:45:32,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-14 13:45:32,722 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 [2023-02-14 13:45:32,723 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] [2023-02-14 13:45:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-14 13:45:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2023-02-14 13:45:32,725 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) [2023-02-14 13:45:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2023-02-14 13:45:32,725 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 19 [2023-02-14 13:45:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:32,725 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2023-02-14 13:45:32,726 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) [2023-02-14 13:45:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2023-02-14 13:45:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 13:45:32,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:32,726 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] [2023-02-14 13:45:32,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 13:45:32,726 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)] === [2023-02-14 13:45:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1777521809, now seen corresponding path program 1 times [2023-02-14 13:45:32,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:32,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302890065] [2023-02-14 13:45:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:32,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302890065] [2023-02-14 13:45:32,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302890065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:32,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:32,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:45:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577686725] [2023-02-14 13:45:32,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:45:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:45:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:45:32,862 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) [2023-02-14 13:45:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:33,023 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2023-02-14 13:45:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:45:33,023 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 [2023-02-14 13:45:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:33,024 INFO L225 Difference]: With dead ends: 144 [2023-02-14 13:45:33,024 INFO L226 Difference]: Without dead ends: 144 [2023-02-14 13:45:33,025 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 [2023-02-14 13:45:33,026 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 [2023-02-14 13:45:33,027 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] [2023-02-14 13:45:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-14 13:45:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2023-02-14 13:45:33,031 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) [2023-02-14 13:45:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2023-02-14 13:45:33,031 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 22 [2023-02-14 13:45:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:33,032 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2023-02-14 13:45:33,032 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) [2023-02-14 13:45:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2023-02-14 13:45:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 13:45:33,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:33,032 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] [2023-02-14 13:45:33,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-14 13:45:33,033 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)] === [2023-02-14 13:45:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1777521810, now seen corresponding path program 1 times [2023-02-14 13:45:33,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:33,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550876032] [2023-02-14 13:45:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550876032] [2023-02-14 13:45:33,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550876032] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:45:33,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:45:33,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:45:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109273488] [2023-02-14 13:45:33,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:45:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:45:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:45:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:45:33,253 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) [2023-02-14 13:45:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:33,432 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2023-02-14 13:45:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:45:33,433 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 [2023-02-14 13:45:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:33,434 INFO L225 Difference]: With dead ends: 141 [2023-02-14 13:45:33,434 INFO L226 Difference]: Without dead ends: 141 [2023-02-14 13:45:33,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:45:33,437 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 [2023-02-14 13:45:33,437 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] [2023-02-14 13:45:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-14 13:45:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-02-14 13:45:33,440 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) [2023-02-14 13:45:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2023-02-14 13:45:33,440 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 22 [2023-02-14 13:45:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:33,441 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2023-02-14 13:45:33,442 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) [2023-02-14 13:45:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2023-02-14 13:45:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 13:45:33,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:33,445 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] [2023-02-14 13:45:33,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 13:45:33,445 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)] === [2023-02-14 13:45:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:33,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1310880280, now seen corresponding path program 1 times [2023-02-14 13:45:33,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:33,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623509216] [2023-02-14 13:45:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:33,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:33,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623509216] [2023-02-14 13:45:33,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623509216] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:45:33,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823178265] [2023-02-14 13:45:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:33,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:45:33,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:45:33,735 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) [2023-02-14 13:45:33,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:45:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:33,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 13:45:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:45:33,901 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 [2023-02-14 13:45:34,027 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:45:34,028 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 [2023-02-14 13:45:34,071 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 [2023-02-14 13:45:34,195 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:34,196 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 [2023-02-14 13:45:34,223 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:34,223 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 [2023-02-14 13:45:34,372 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:34,373 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 [2023-02-14 13:45:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:34,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:45:36,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:36,855 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 [2023-02-14 13:45:36,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:36,868 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 [2023-02-14 13:45:36,875 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 [2023-02-14 13:45:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:41,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823178265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:45:41,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:45:41,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2023-02-14 13:45:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622895659] [2023-02-14 13:45:41,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:45:41,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:45:41,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:45:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=790, Unknown=3, NotChecked=0, Total=930 [2023-02-14 13:45:41,407 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) [2023-02-14 13:45:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:42,571 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2023-02-14 13:45:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 13:45:42,572 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 [2023-02-14 13:45:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:42,574 INFO L225 Difference]: With dead ends: 258 [2023-02-14 13:45:42,574 INFO L226 Difference]: Without dead ends: 258 [2023-02-14 13:45:42,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=277, Invalid=1202, Unknown=3, NotChecked=0, Total=1482 [2023-02-14 13:45:42,575 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 688 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:45:42,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 705 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 13:45:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-14 13:45:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 158. [2023-02-14 13:45:42,578 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) [2023-02-14 13:45:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2023-02-14 13:45:42,579 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 25 [2023-02-14 13:45:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:42,579 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2023-02-14 13:45:42,579 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) [2023-02-14 13:45:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2023-02-14 13:45:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 13:45:42,580 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:42,580 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] [2023-02-14 13:45:42,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 13:45:42,781 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 [2023-02-14 13:45:42,781 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)] === [2023-02-14 13:45:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1310880279, now seen corresponding path program 1 times [2023-02-14 13:45:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:42,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091481573] [2023-02-14 13:45:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:43,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091481573] [2023-02-14 13:45:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091481573] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:45:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345119436] [2023-02-14 13:45:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:43,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:45:43,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:45:43,211 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) [2023-02-14 13:45:43,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:45:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:43,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 13:45:43,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:45:43,325 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 [2023-02-14 13:45:43,428 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 [2023-02-14 13:45:43,447 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:45:43,447 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 [2023-02-14 13:45:43,495 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 [2023-02-14 13:45:43,505 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 [2023-02-14 13:45:43,641 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:45:43,641 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 [2023-02-14 13:45:43,646 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 [2023-02-14 13:45:43,671 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:43,672 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 [2023-02-14 13:45:43,729 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:43,729 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 [2023-02-14 13:45:43,736 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 [2023-02-14 13:45:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:43,917 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 15 treesize of output 7 [2023-02-14 13:45:43,921 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:43,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:43,924 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 25 treesize of output 16 [2023-02-14 13:45:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:43,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:45:44,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:44,624 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 [2023-02-14 13:45:44,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:44,632 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 [2023-02-14 13:45:44,639 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 [2023-02-14 13:45:44,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:44,679 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 [2023-02-14 13:45:44,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:44,688 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 [2023-02-14 13:45:44,693 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:44,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:44,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:44,698 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 [2023-02-14 13:45:44,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:44,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:44,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:44,706 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 [2023-02-14 13:45:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:44,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345119436] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:45:44,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:45:44,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-02-14 13:45:44,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155515830] [2023-02-14 13:45:44,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:45:44,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 13:45:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:44,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 13:45:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1010, Unknown=4, NotChecked=0, Total=1122 [2023-02-14 13:45:44,963 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) [2023-02-14 13:45:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:46,779 INFO L93 Difference]: Finished difference Result 260 states and 289 transitions. [2023-02-14 13:45:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 13:45:46,779 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 [2023-02-14 13:45:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:46,780 INFO L225 Difference]: With dead ends: 260 [2023-02-14 13:45:46,780 INFO L226 Difference]: Without dead ends: 260 [2023-02-14 13:45:46,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=414, Invalid=2234, Unknown=4, NotChecked=0, Total=2652 [2023-02-14 13:45:46,782 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 846 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:45:46,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1124 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-14 13:45:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-14 13:45:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2023-02-14 13:45:46,785 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) [2023-02-14 13:45:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2023-02-14 13:45:46,786 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 25 [2023-02-14 13:45:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:46,786 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2023-02-14 13:45:46,786 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) [2023-02-14 13:45:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2023-02-14 13:45:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 13:45:46,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:46,787 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] [2023-02-14 13:45:46,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 13:45:46,992 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 [2023-02-14 13:45:46,993 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)] === [2023-02-14 13:45:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash 14127102, now seen corresponding path program 1 times [2023-02-14 13:45:46,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:46,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100427033] [2023-02-14 13:45:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:46,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:47,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:47,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100427033] [2023-02-14 13:45:47,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100427033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:45:47,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907242725] [2023-02-14 13:45:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:47,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:45:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:45:47,273 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) [2023-02-14 13:45:47,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:45:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 13:45:47,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:45:47,373 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 [2023-02-14 13:45:47,447 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:45:47,448 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 [2023-02-14 13:45:47,481 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 [2023-02-14 13:45:47,599 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:47,600 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-02-14 13:45:47,631 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:47,631 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 [2023-02-14 13:45:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:47,788 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 [2023-02-14 13:45:47,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:47,816 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 [2023-02-14 13:45:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:45:48,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:48,136 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 [2023-02-14 13:45:48,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:48,146 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 [2023-02-14 13:45:48,151 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 [2023-02-14 13:45:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:52,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907242725] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:45:52,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:45:52,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-02-14 13:45:52,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051269685] [2023-02-14 13:45:52,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:45:52,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 13:45:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 13:45:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=688, Unknown=3, NotChecked=0, Total=812 [2023-02-14 13:45:52,573 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) [2023-02-14 13:45:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:53,506 INFO L93 Difference]: Finished difference Result 225 states and 256 transitions. [2023-02-14 13:45:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 13:45:53,506 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 [2023-02-14 13:45:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:53,507 INFO L225 Difference]: With dead ends: 225 [2023-02-14 13:45:53,507 INFO L226 Difference]: Without dead ends: 225 [2023-02-14 13:45:53,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=225, Invalid=1032, Unknown=3, NotChecked=0, Total=1260 [2023-02-14 13:45:53,509 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 467 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:45:53,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 762 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 13:45:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-14 13:45:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 165. [2023-02-14 13:45:53,522 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) [2023-02-14 13:45:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2023-02-14 13:45:53,525 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 27 [2023-02-14 13:45:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:53,525 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2023-02-14 13:45:53,525 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) [2023-02-14 13:45:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2023-02-14 13:45:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 13:45:53,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:53,526 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] [2023-02-14 13:45:53,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:45:53,732 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 [2023-02-14 13:45:53,732 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)] === [2023-02-14 13:45:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:53,733 INFO L85 PathProgramCache]: Analyzing trace with hash 14127103, now seen corresponding path program 1 times [2023-02-14 13:45:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:53,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323535977] [2023-02-14 13:45:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:53,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:54,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323535977] [2023-02-14 13:45:54,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323535977] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:45:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798841402] [2023-02-14 13:45:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:54,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:45:54,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:45:54,161 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) [2023-02-14 13:45:54,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:45:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:54,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 13:45:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:45:54,252 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 [2023-02-14 13:45:54,314 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 [2023-02-14 13:45:54,328 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:45:54,329 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 [2023-02-14 13:45:54,361 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 [2023-02-14 13:45:54,374 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 [2023-02-14 13:45:54,496 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:45:54,496 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 [2023-02-14 13:45:54,502 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 [2023-02-14 13:45:54,514 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:54,514 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 [2023-02-14 13:45:54,556 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:45:54,556 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 [2023-02-14 13:45:54,560 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 [2023-02-14 13:45:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:54,729 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 [2023-02-14 13:45:54,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:54,739 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 [2023-02-14 13:45:54,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:54,764 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 15 treesize of output 7 [2023-02-14 13:45:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:54,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:54,771 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 25 treesize of output 16 [2023-02-14 13:45:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:54,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:45:55,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:55,334 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 [2023-02-14 13:45:55,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:55,341 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 [2023-02-14 13:45:55,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:55,357 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 [2023-02-14 13:45:55,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:55,371 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 [2023-02-14 13:45:55,378 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 [2023-02-14 13:45:55,383 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 [2023-02-14 13:45:55,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:45:55,467 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 [2023-02-14 13:45:55,471 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:45:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:45:55,475 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 [2023-02-14 13:45:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:55,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798841402] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:45:55,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:45:55,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-02-14 13:45:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12355389] [2023-02-14 13:45:55,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:45:55,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:45:55,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:45:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=826, Unknown=5, NotChecked=0, Total=930 [2023-02-14 13:45:55,707 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) [2023-02-14 13:45:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:45:56,981 INFO L93 Difference]: Finished difference Result 229 states and 260 transitions. [2023-02-14 13:45:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:45:56,982 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 [2023-02-14 13:45:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:45:56,983 INFO L225 Difference]: With dead ends: 229 [2023-02-14 13:45:56,983 INFO L226 Difference]: Without dead ends: 229 [2023-02-14 13:45:56,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1382, Unknown=5, NotChecked=0, Total=1640 [2023-02-14 13:45:56,984 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 588 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:45:56,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 885 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 13:45:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-02-14 13:45:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 165. [2023-02-14 13:45:56,988 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) [2023-02-14 13:45:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2023-02-14 13:45:56,988 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 27 [2023-02-14 13:45:56,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:45:56,989 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2023-02-14 13:45:56,989 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) [2023-02-14 13:45:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2023-02-14 13:45:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 13:45:56,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:45:56,990 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] [2023-02-14 13:45:56,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 13:45:57,190 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 [2023-02-14 13:45:57,190 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)] === [2023-02-14 13:45:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:45:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash 408081261, now seen corresponding path program 1 times [2023-02-14 13:45:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:45:57,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110599850] [2023-02-14 13:45:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:57,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:45:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:45:57,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:45:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110599850] [2023-02-14 13:45:57,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110599850] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:45:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51178008] [2023-02-14 13:45:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:45:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:45:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:45:57,548 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) [2023-02-14 13:45:57,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:45:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:45:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 13:45:57,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:45:57,740 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 [2023-02-14 13:45:57,743 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 [2023-02-14 13:45:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:45:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:45:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:45:57,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51178008] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:45:57,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:45:57,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 24 [2023-02-14 13:45:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654101980] [2023-02-14 13:45:57,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:45:57,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 13:45:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:45:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 13:45:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-02-14 13:45:57,960 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 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) [2023-02-14 13:46:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:46:00,134 INFO L93 Difference]: Finished difference Result 237 states and 259 transitions. [2023-02-14 13:46:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-14 13:46:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 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 [2023-02-14 13:46:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:46:00,135 INFO L225 Difference]: With dead ends: 237 [2023-02-14 13:46:00,135 INFO L226 Difference]: Without dead ends: 237 [2023-02-14 13:46:00,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2023-02-14 13:46:00,138 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 828 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:46:00,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 618 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 13:46:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-02-14 13:46:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 153. [2023-02-14 13:46:00,141 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) [2023-02-14 13:46:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2023-02-14 13:46:00,141 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 30 [2023-02-14 13:46:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:46:00,142 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2023-02-14 13:46:00,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 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) [2023-02-14 13:46:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2023-02-14 13:46:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 13:46:00,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:46:00,143 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] [2023-02-14 13:46:00,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 13:46:00,348 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 [2023-02-14 13:46:00,348 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)] === [2023-02-14 13:46:00,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:46:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2056569881, now seen corresponding path program 1 times [2023-02-14 13:46:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:46:00,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257731543] [2023-02-14 13:46:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:00,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:46:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:00,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:46:00,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257731543] [2023-02-14 13:46:00,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257731543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:46:00,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287182645] [2023-02-14 13:46:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:00,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:46:00,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:46:00,763 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) [2023-02-14 13:46:00,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:46:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:00,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 13:46:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:46:00,995 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 [2023-02-14 13:46:01,007 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:46:01,007 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 [2023-02-14 13:46:01,047 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 [2023-02-14 13:46:01,060 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 [2023-02-14 13:46:01,228 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:46:01,229 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 [2023-02-14 13:46:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:46:01,236 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 [2023-02-14 13:46:01,280 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:46:01,281 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 [2023-02-14 13:46:01,286 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 [2023-02-14 13:46:01,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:01,401 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 [2023-02-14 13:46:01,407 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:01,409 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 [2023-02-14 13:46:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:01,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:46:02,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:02,066 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 [2023-02-14 13:46:02,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:02,075 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 [2023-02-14 13:46:02,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-14 13:46:02,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:02,113 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 [2023-02-14 13:46:02,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:02,120 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 [2023-02-14 13:46:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:02,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:46:02,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:46:02,127 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 [2023-02-14 13:46:02,131 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:46:02,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:46:02,135 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 [2023-02-14 13:46:02,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:02,508 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 [2023-02-14 13:46:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:03,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287182645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:46:03,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:46:03,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2023-02-14 13:46:03,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562379414] [2023-02-14 13:46:03,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:46:03,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 13:46:03,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:46:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 13:46:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1130, Unknown=12, NotChecked=0, Total=1260 [2023-02-14 13:46:03,245 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) [2023-02-14 13:46:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:46:04,973 INFO L93 Difference]: Finished difference Result 267 states and 295 transitions. [2023-02-14 13:46:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 13:46:04,974 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 [2023-02-14 13:46:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:46:04,975 INFO L225 Difference]: With dead ends: 267 [2023-02-14 13:46:04,975 INFO L226 Difference]: Without dead ends: 267 [2023-02-14 13:46:04,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=448, Invalid=2620, Unknown=12, NotChecked=0, Total=3080 [2023-02-14 13:46:04,976 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 421 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:46:04,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 878 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 13:46:04,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-14 13:46:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 182. [2023-02-14 13:46:04,982 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) [2023-02-14 13:46:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 208 transitions. [2023-02-14 13:46:04,983 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 208 transitions. Word has length 31 [2023-02-14 13:46:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:46:04,983 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 208 transitions. [2023-02-14 13:46:04,983 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) [2023-02-14 13:46:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 208 transitions. [2023-02-14 13:46:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 13:46:04,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:46:04,984 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] [2023-02-14 13:46:04,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 13:46:05,190 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 [2023-02-14 13:46:05,191 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)] === [2023-02-14 13:46:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:46:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2056569880, now seen corresponding path program 1 times [2023-02-14 13:46:05,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:46:05,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130028417] [2023-02-14 13:46:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:05,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:46:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:46:05,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130028417] [2023-02-14 13:46:05,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130028417] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:46:05,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908296945] [2023-02-14 13:46:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:46:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:46:05,493 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) [2023-02-14 13:46:05,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:46:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 13:46:05,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:46:05,763 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:46:05,764 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 [2023-02-14 13:46:05,806 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 [2023-02-14 13:46:05,972 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:46:05,973 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 [2023-02-14 13:46:05,999 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:46:05,999 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 [2023-02-14 13:46:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:06,103 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 [2023-02-14 13:46:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:06,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:46:06,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:06,478 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 [2023-02-14 13:46:06,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:06,485 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 [2023-02-14 13:46:06,488 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 [2023-02-14 13:46:09,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:09,150 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 [2023-02-14 13:46:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:12,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908296945] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:46:12,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:46:12,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2023-02-14 13:46:12,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059720972] [2023-02-14 13:46:12,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:46:12,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 13:46:12,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:46:12,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 13:46:12,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=915, Unknown=5, NotChecked=0, Total=1056 [2023-02-14 13:46:12,359 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) [2023-02-14 13:46:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:46:13,510 INFO L93 Difference]: Finished difference Result 255 states and 285 transitions. [2023-02-14 13:46:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 13:46:13,510 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 [2023-02-14 13:46:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:46:13,511 INFO L225 Difference]: With dead ends: 255 [2023-02-14 13:46:13,511 INFO L226 Difference]: Without dead ends: 255 [2023-02-14 13:46:13,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=379, Invalid=1778, Unknown=5, NotChecked=0, Total=2162 [2023-02-14 13:46:13,512 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 422 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:46:13,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 773 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 13:46:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-02-14 13:46:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2023-02-14 13:46:13,516 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) [2023-02-14 13:46:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2023-02-14 13:46:13,516 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 31 [2023-02-14 13:46:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:46:13,517 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2023-02-14 13:46:13,517 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) [2023-02-14 13:46:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2023-02-14 13:46:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 13:46:13,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:46:13,517 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] [2023-02-14 13:46:13,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 13:46:13,723 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 [2023-02-14 13:46:13,724 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)] === [2023-02-14 13:46:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:46:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash 678653734, now seen corresponding path program 1 times [2023-02-14 13:46:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:46:13,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753885079] [2023-02-14 13:46:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:46:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:13,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:46:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753885079] [2023-02-14 13:46:13,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753885079] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:46:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814119904] [2023-02-14 13:46:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:13,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:46:13,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:46:13,821 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) [2023-02-14 13:46:13,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 13:46:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 13:46:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:46:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:13,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:46:14,004 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:46:14,004 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 [2023-02-14 13:46:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:14,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814119904] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:46:14,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:46:14,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-02-14 13:46:14,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12452558] [2023-02-14 13:46:14,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:46:14,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:46:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:46:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:46:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:46:14,019 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) [2023-02-14 13:46:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:46:14,233 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2023-02-14 13:46:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:46:14,233 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 [2023-02-14 13:46:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:46:14,234 INFO L225 Difference]: With dead ends: 238 [2023-02-14 13:46:14,234 INFO L226 Difference]: Without dead ends: 238 [2023-02-14 13:46:14,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:46:14,235 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 274 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:46:14,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 134 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:46:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-14 13:46:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2023-02-14 13:46:14,238 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) [2023-02-14 13:46:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2023-02-14 13:46:14,238 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 33 [2023-02-14 13:46:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:46:14,239 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2023-02-14 13:46:14,239 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) [2023-02-14 13:46:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2023-02-14 13:46:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 13:46:14,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:46:14,239 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] [2023-02-14 13:46:14,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 13:46:14,441 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 [2023-02-14 13:46:14,441 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)] === [2023-02-14 13:46:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:46:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 678653735, now seen corresponding path program 1 times [2023-02-14 13:46:14,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:46:14,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470202450] [2023-02-14 13:46:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:14,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:46:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:14,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:46:14,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470202450] [2023-02-14 13:46:14,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470202450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:46:14,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520846525] [2023-02-14 13:46:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:14,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:46:14,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:46:14,737 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) [2023-02-14 13:46:14,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:46:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 13:46:14,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:46:14,985 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:46:14,985 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 [2023-02-14 13:46:15,013 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 [2023-02-14 13:46:15,124 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:46:15,124 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 [2023-02-14 13:46:15,144 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:46:15,144 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 [2023-02-14 13:46:15,212 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:15,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:15,215 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 [2023-02-14 13:46:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:46:15,410 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_108| Int) (v_ArrVal_972 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_108| |c_ULTIMATE.start_main_~head~0#1.offset|)) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_972) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_108|) 0)) (not (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_108|)))) is different from false [2023-02-14 13:46:15,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:15,422 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 [2023-02-14 13:46:15,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:15,428 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 [2023-02-14 13:46:15,432 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 [2023-02-14 13:46:15,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:15,819 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 [2023-02-14 13:46:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:16,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520846525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:46:16,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:46:16,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 29 [2023-02-14 13:46:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773614640] [2023-02-14 13:46:16,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:46:16,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 13:46:16,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:46:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 13:46:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=656, Unknown=5, NotChecked=52, Total=812 [2023-02-14 13:46:16,119 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 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) [2023-02-14 13:46:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:46:17,862 INFO L93 Difference]: Finished difference Result 305 states and 345 transitions. [2023-02-14 13:46:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 13:46:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 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 [2023-02-14 13:46:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:46:17,863 INFO L225 Difference]: With dead ends: 305 [2023-02-14 13:46:17,863 INFO L226 Difference]: Without dead ends: 305 [2023-02-14 13:46:17,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=442, Invalid=2007, Unknown=5, NotChecked=96, Total=2550 [2023-02-14 13:46:17,865 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 553 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:46:17,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1090 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1761 Invalid, 0 Unknown, 194 Unchecked, 1.0s Time] [2023-02-14 13:46:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-02-14 13:46:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 227. [2023-02-14 13:46:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 204 states have (on average 1.3676470588235294) internal successors, (279), 226 states have internal predecessors, (279), 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) [2023-02-14 13:46:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 279 transitions. [2023-02-14 13:46:17,869 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 279 transitions. Word has length 33 [2023-02-14 13:46:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:46:17,869 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 279 transitions. [2023-02-14 13:46:17,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 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) [2023-02-14 13:46:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 279 transitions. [2023-02-14 13:46:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 13:46:17,870 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:46:17,870 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] [2023-02-14 13:46:17,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 13:46:18,070 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 [2023-02-14 13:46:18,071 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)] === [2023-02-14 13:46:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:46:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1865212554, now seen corresponding path program 2 times [2023-02-14 13:46:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:46:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050870535] [2023-02-14 13:46:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:46:18,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:46:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:46:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:46:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050870535] [2023-02-14 13:46:18,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050870535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:46:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950908154] [2023-02-14 13:46:18,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:46:18,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:46:18,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:46:18,537 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) [2023-02-14 13:46:18,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 13:46:18,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:46:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:46:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-14 13:46:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:46:18,659 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 [2023-02-14 13:46:18,717 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:46:18,717 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 [2023-02-14 13:46:18,746 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 [2023-02-14 13:46:18,750 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 [2023-02-14 13:46:18,855 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-14 13:46:18,856 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 [2023-02-14 13:46:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:46:18,864 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 26 treesize of output 21 [2023-02-14 13:46:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:46:18,911 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 13:46:18,911 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 [2023-02-14 13:46:18,921 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-02-14 13:46:18,921 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 [2023-02-14 13:46:19,171 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:19,177 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:19,184 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-02-14 13:46:19,184 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 [2023-02-14 13:46:19,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:46:19,192 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:46:19,192 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 [2023-02-14 13:46:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:46:19,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:46:26,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:46:26,532 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 24256 treesize of output 21636 [2023-02-14 13:46:27,123 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 20067 treesize of output 19955