./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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/array-examples/standard_strcpy_original-1.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 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:05:32,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:05:32,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:05:32,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:05:32,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:05:32,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:05:32,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:05:32,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:05:32,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:05:32,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:05:32,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:05:32,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:05:32,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:05:32,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:05:32,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:05:32,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:05:32,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:05:32,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:05:32,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:05:32,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:05:32,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:05:32,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:05:32,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:05:32,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:05:32,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:05:32,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:05:32,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:05:32,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:05:32,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:05:32,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:05:32,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:05:32,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:05:32,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:05:32,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:05:32,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:05:32,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:05:32,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:05:32,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:05:32,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:05:32,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:05:32,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:05:32,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:05:32,825 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:05:32,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:05:32,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:05:32,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:05:32,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:05:32,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:05:32,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:05:32,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:05:32,828 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:05:32,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:05:32,829 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:05:32,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:05:32,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:05:32,830 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:05:32,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:05:32,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:05:32,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:05:32,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:05:32,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:05:32,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:05:32,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:05:32,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:05:32,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:05:32,831 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:05:32,832 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:05:32,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:05:32,832 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:05:32,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2023-02-16 03:05:33,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:05:33,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:05:33,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:05:33,064 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:05:33,064 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:05:33,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2023-02-16 03:05:34,087 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:05:34,210 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:05:34,210 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2023-02-16 03:05:34,214 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6dfea2c8/d8eb68009b364f89bb354824d79a6c41/FLAG764c47740 [2023-02-16 03:05:34,224 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6dfea2c8/d8eb68009b364f89bb354824d79a6c41 [2023-02-16 03:05:34,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:05:34,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:05:34,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:05:34,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:05:34,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:05:34,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc0642d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34, skipping insertion in model container [2023-02-16 03:05:34,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:05:34,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:05:34,344 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/array-examples/standard_strcpy_original-1.i[819,832] [2023-02-16 03:05:34,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:05:34,370 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:05:34,379 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/array-examples/standard_strcpy_original-1.i[819,832] [2023-02-16 03:05:34,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:05:34,391 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:05:34,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34 WrapperNode [2023-02-16 03:05:34,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:05:34,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:05:34,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:05:34,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:05:34,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,427 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-02-16 03:05:34,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:05:34,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:05:34,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:05:34,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:05:34,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,441 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:05:34,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:05:34,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:05:34,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:05:34,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (1/1) ... [2023-02-16 03:05:34,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:05:34,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:34,467 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) [2023-02-16 03:05:34,472 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 [2023-02-16 03:05:34,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:05:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:05:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 03:05:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:05:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:05:34,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:05:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:05:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:05:34,552 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:05:34,556 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:05:34,787 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:05:34,791 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:05:34,791 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 03:05:34,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:05:34 BoogieIcfgContainer [2023-02-16 03:05:34,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:05:34,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:05:34,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:05:34,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:05:34,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:05:34" (1/3) ... [2023-02-16 03:05:34,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c57d355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:05:34, skipping insertion in model container [2023-02-16 03:05:34,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:34" (2/3) ... [2023-02-16 03:05:34,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c57d355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:05:34, skipping insertion in model container [2023-02-16 03:05:34,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:05:34" (3/3) ... [2023-02-16 03:05:34,800 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2023-02-16 03:05:34,812 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:05:34,812 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-02-16 03:05:34,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:05:34,843 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;@77f468a9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:05:34,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-02-16 03:05:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 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) [2023-02-16 03:05:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:05:34,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:34,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:05:34,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-16 03:05:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821905181] [2023-02-16 03:05:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:34,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:35,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821905181] [2023-02-16 03:05:35,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821905181] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:35,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:35,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:05:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063733133] [2023-02-16 03:05:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:35,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:05:35,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:05:35,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:05:35,099 INFO L87 Difference]: Start difference. First operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-02-16 03:05:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:35,175 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-02-16 03:05:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:05:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-02-16 03:05:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:35,182 INFO L225 Difference]: With dead ends: 36 [2023-02-16 03:05:35,182 INFO L226 Difference]: Without dead ends: 34 [2023-02-16 03:05:35,183 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 [2023-02-16 03:05:35,186 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:35,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-16 03:05:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-16 03:05:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.565217391304348) internal successors, (36), 33 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) [2023-02-16 03:05:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-02-16 03:05:35,208 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 4 [2023-02-16 03:05:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:35,208 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-02-16 03:05:35,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-02-16 03:05:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-02-16 03:05:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:05:35,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:35,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:05:35,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:05:35,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-16 03:05:35,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:35,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191725164] [2023-02-16 03:05:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191725164] [2023-02-16 03:05:35,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191725164] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:35,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:35,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:05:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659658865] [2023-02-16 03:05:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:35,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:05:35,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:05:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:05:35,305 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-02-16 03:05:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:35,335 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-02-16 03:05:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:05:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-02-16 03:05:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:35,337 INFO L225 Difference]: With dead ends: 38 [2023-02-16 03:05:35,338 INFO L226 Difference]: Without dead ends: 38 [2023-02-16 03:05:35,340 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 [2023-02-16 03:05:35,343 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:35,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-16 03:05:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-02-16 03:05:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-02-16 03:05:35,351 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 4 [2023-02-16 03:05:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:35,352 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-02-16 03:05:35,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-02-16 03:05:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-02-16 03:05:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:05:35,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:35,355 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:05:35,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:35,359 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-16 03:05:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:35,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110016291] [2023-02-16 03:05:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:35,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110016291] [2023-02-16 03:05:35,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110016291] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035581563] [2023-02-16 03:05:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:35,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:35,575 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) [2023-02-16 03:05:35,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:05:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-16 03:05:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:35,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:05:35,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:05:35,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:05:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:35,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:35,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035581563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:35,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:35,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-02-16 03:05:35,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736953643] [2023-02-16 03:05:35,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:05:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:05:35,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:05:35,823 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2023-02-16 03:05:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:35,903 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-02-16 03:05:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:05:35,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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 8 [2023-02-16 03:05:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:35,905 INFO L225 Difference]: With dead ends: 48 [2023-02-16 03:05:35,905 INFO L226 Difference]: Without dead ends: 48 [2023-02-16 03:05:35,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:05:35,906 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:35,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-16 03:05:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-02-16 03:05:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-02-16 03:05:35,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 8 [2023-02-16 03:05:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:35,910 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-02-16 03:05:35,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2023-02-16 03:05:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-02-16 03:05:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 03:05:35,911 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:35,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 03:05:35,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 03:05:36,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:36,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2023-02-16 03:05:36,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777930381] [2023-02-16 03:05:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:36,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:36,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777930381] [2023-02-16 03:05:36,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777930381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049326146] [2023-02-16 03:05:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:36,219 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) [2023-02-16 03:05:36,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:05:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 03:05:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:36,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:36,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049326146] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:36,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:36,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-02-16 03:05:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439095720] [2023-02-16 03:05:36,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:36,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:05:36,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:05:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:05:36,318 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2023-02-16 03:05:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:36,491 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2023-02-16 03:05:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:05:36,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 03:05:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:36,493 INFO L225 Difference]: With dead ends: 196 [2023-02-16 03:05:36,493 INFO L226 Difference]: Without dead ends: 196 [2023-02-16 03:05:36,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:05:36,494 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 426 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:36,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 92 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-02-16 03:05:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 55. [2023-02-16 03:05:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 54 states have internal predecessors, (58), 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) [2023-02-16 03:05:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2023-02-16 03:05:36,499 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 13 [2023-02-16 03:05:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:36,499 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2023-02-16 03:05:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2023-02-16 03:05:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2023-02-16 03:05:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 03:05:36,500 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:36,500 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-02-16 03:05:36,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:36,704 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,SelfDestructingSolverStorable3 [2023-02-16 03:05:36,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-02-16 03:05:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:36,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164913747] [2023-02-16 03:05:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:36,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:36,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164913747] [2023-02-16 03:05:36,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164913747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:36,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013465241] [2023-02-16 03:05:36,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:05:36,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:36,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:36,864 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) [2023-02-16 03:05:36,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:05:36,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:05:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 03:05:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:36,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:05:36,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:05:36,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:05:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:37,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:37,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013465241] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:37,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:37,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-16 03:05:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12023503] [2023-02-16 03:05:37,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:37,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:05:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:05:37,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:37,227 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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) [2023-02-16 03:05:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:37,435 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2023-02-16 03:05:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:05:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 20 [2023-02-16 03:05:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:37,436 INFO L225 Difference]: With dead ends: 76 [2023-02-16 03:05:37,437 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 03:05:37,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:05:37,437 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:37,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 124 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 03:05:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-16 03:05:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 71 states have internal predecessors, (78), 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) [2023-02-16 03:05:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2023-02-16 03:05:37,441 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 20 [2023-02-16 03:05:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:37,441 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2023-02-16 03:05:37,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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) [2023-02-16 03:05:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2023-02-16 03:05:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 03:05:37,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:37,442 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:37,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:37,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:37,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2023-02-16 03:05:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:37,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598476125] [2023-02-16 03:05:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 03:05:37,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:37,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598476125] [2023-02-16 03:05:37,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598476125] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:37,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:37,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:05:37,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969450661] [2023-02-16 03:05:37,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:05:37,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:37,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:05:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:05:37,690 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-02-16 03:05:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:37,700 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-02-16 03:05:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:05:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 32 [2023-02-16 03:05:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:37,701 INFO L225 Difference]: With dead ends: 70 [2023-02-16 03:05:37,701 INFO L226 Difference]: Without dead ends: 70 [2023-02-16 03:05:37,701 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 [2023-02-16 03:05:37,701 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:37,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-16 03:05:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-02-16 03:05:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 69 states have internal predecessors, (76), 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) [2023-02-16 03:05:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2023-02-16 03:05:37,705 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 32 [2023-02-16 03:05:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:37,705 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2023-02-16 03:05:37,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-02-16 03:05:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2023-02-16 03:05:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 03:05:37,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:37,706 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:37,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:05:37,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:37,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2023-02-16 03:05:37,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:37,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073797175] [2023-02-16 03:05:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 03:05:37,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:37,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073797175] [2023-02-16 03:05:37,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073797175] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:37,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:37,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:05:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705176094] [2023-02-16 03:05:37,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:37,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:37,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:37,839 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-02-16 03:05:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:37,871 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-02-16 03:05:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 32 [2023-02-16 03:05:37,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:37,872 INFO L225 Difference]: With dead ends: 84 [2023-02-16 03:05:37,872 INFO L226 Difference]: Without dead ends: 84 [2023-02-16 03:05:37,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:37,873 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:37,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-16 03:05:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2023-02-16 03:05:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 74 states have internal predecessors, (83), 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) [2023-02-16 03:05:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2023-02-16 03:05:37,876 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 32 [2023-02-16 03:05:37,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:37,876 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2023-02-16 03:05:37,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-02-16 03:05:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2023-02-16 03:05:37,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 03:05:37,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:37,879 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:37,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:05:37,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2023-02-16 03:05:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:37,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015908876] [2023-02-16 03:05:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:37,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:37,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015908876] [2023-02-16 03:05:37,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015908876] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:37,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941957352] [2023-02-16 03:05:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:37,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:37,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:37,977 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) [2023-02-16 03:05:37,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:05:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:38,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:05:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:38,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941957352] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:38,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:38,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-16 03:05:38,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782438660] [2023-02-16 03:05:38,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:38,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:05:38,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:38,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:05:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:38,153 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2023-02-16 03:05:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:38,418 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2023-02-16 03:05:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:05:38,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 34 [2023-02-16 03:05:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:38,420 INFO L225 Difference]: With dead ends: 390 [2023-02-16 03:05:38,420 INFO L226 Difference]: Without dead ends: 390 [2023-02-16 03:05:38,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:38,421 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 764 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:38,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 183 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:05:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-16 03:05:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 90. [2023-02-16 03:05:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 89 states have internal predecessors, (97), 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) [2023-02-16 03:05:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2023-02-16 03:05:38,425 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 34 [2023-02-16 03:05:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:38,426 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2023-02-16 03:05:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2023-02-16 03:05:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2023-02-16 03:05:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:05:38,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:38,427 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2023-02-16 03:05:38,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:38,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:38,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2023-02-16 03:05:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:38,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860123506] [2023-02-16 03:05:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:38,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860123506] [2023-02-16 03:05:38,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860123506] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348984479] [2023-02-16 03:05:38,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:05:38,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:38,984 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) [2023-02-16 03:05:38,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:05:39,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:05:39,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:39,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 03:05:39,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:05:39,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:05:39,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:05:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-16 03:05:39,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:05:39,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348984479] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:39,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:05:39,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2023-02-16 03:05:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773734661] [2023-02-16 03:05:39,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:39,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:05:39,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:05:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:39,208 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:39,248 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2023-02-16 03:05:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:05:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-16 03:05:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:39,249 INFO L225 Difference]: With dead ends: 98 [2023-02-16 03:05:39,249 INFO L226 Difference]: Without dead ends: 98 [2023-02-16 03:05:39,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:39,250 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:39,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 43 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-16 03:05:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2023-02-16 03:05:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 88 states have internal predecessors, (93), 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) [2023-02-16 03:05:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2023-02-16 03:05:39,253 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 44 [2023-02-16 03:05:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:39,253 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2023-02-16 03:05:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2023-02-16 03:05:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 03:05:39,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:39,254 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:39,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:39,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:39,461 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:39,462 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2023-02-16 03:05:39,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:39,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571237777] [2023-02-16 03:05:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:39,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:39,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571237777] [2023-02-16 03:05:39,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571237777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833581136] [2023-02-16 03:05:39,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:05:39,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:39,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:39,672 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) [2023-02-16 03:05:39,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:05:39,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:05:39,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:05:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:39,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:40,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833581136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:40,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:40,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-16 03:05:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900500751] [2023-02-16 03:05:40,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:40,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 03:05:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 03:05:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:05:40,130 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 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) [2023-02-16 03:05:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:40,769 INFO L93 Difference]: Finished difference Result 802 states and 834 transitions. [2023-02-16 03:05:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 03:05:40,770 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 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 66 [2023-02-16 03:05:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:40,774 INFO L225 Difference]: With dead ends: 802 [2023-02-16 03:05:40,774 INFO L226 Difference]: Without dead ends: 802 [2023-02-16 03:05:40,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:05:40,776 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1934 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:40,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1934 Valid, 348 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:05:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2023-02-16 03:05:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 153. [2023-02-16 03:05:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.0680272108843538) internal successors, (157), 152 states have internal predecessors, (157), 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) [2023-02-16 03:05:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2023-02-16 03:05:40,781 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 66 [2023-02-16 03:05:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:40,781 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2023-02-16 03:05:40,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 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) [2023-02-16 03:05:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2023-02-16 03:05:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-16 03:05:40,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:40,782 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:40,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:40,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:40,991 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:40,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:40,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2023-02-16 03:05:40,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:40,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035370000] [2023-02-16 03:05:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:40,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:41,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035370000] [2023-02-16 03:05:41,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035370000] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:41,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720600139] [2023-02-16 03:05:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:05:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:41,678 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) [2023-02-16 03:05:41,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:05:41,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:05:41,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:05:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-16 03:05:41,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:42,102 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 21 treesize of output 17 [2023-02-16 03:05:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-16 03:05:42,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720600139] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:42,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:42,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2023-02-16 03:05:42,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146466243] [2023-02-16 03:05:42,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:42,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-16 03:05:42,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-16 03:05:42,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 03:05:42,224 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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) [2023-02-16 03:05:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:44,106 INFO L93 Difference]: Finished difference Result 799 states and 836 transitions. [2023-02-16 03:05:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-16 03:05:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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 130 [2023-02-16 03:05:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:44,109 INFO L225 Difference]: With dead ends: 799 [2023-02-16 03:05:44,109 INFO L226 Difference]: Without dead ends: 799 [2023-02-16 03:05:44,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2023-02-16 03:05:44,111 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4591 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4591 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:44,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4591 Valid, 371 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:05:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-02-16 03:05:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 536. [2023-02-16 03:05:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.3132075471698113) internal successors, (696), 535 states have internal predecessors, (696), 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) [2023-02-16 03:05:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 696 transitions. [2023-02-16 03:05:44,121 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 696 transitions. Word has length 130 [2023-02-16 03:05:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:44,121 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 696 transitions. [2023-02-16 03:05:44,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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) [2023-02-16 03:05:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 696 transitions. [2023-02-16 03:05:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-16 03:05:44,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:44,122 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:44,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-16 03:05:44,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:44,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 730106113, now seen corresponding path program 1 times [2023-02-16 03:05:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:44,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686009932] [2023-02-16 03:05:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686009932] [2023-02-16 03:05:45,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686009932] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607171987] [2023-02-16 03:05:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:45,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:45,044 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) [2023-02-16 03:05:45,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:05:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 03:05:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:45,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:46,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607171987] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:46,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:46,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2023-02-16 03:05:46,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26504979] [2023-02-16 03:05:46,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:46,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-16 03:05:46,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-16 03:05:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:05:46,380 INFO L87 Difference]: Start difference. First operand 536 states and 696 transitions. Second operand has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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) [2023-02-16 03:05:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:48,331 INFO L93 Difference]: Finished difference Result 1622 states and 1688 transitions. [2023-02-16 03:05:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-16 03:05:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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 135 [2023-02-16 03:05:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:48,335 INFO L225 Difference]: With dead ends: 1622 [2023-02-16 03:05:48,336 INFO L226 Difference]: Without dead ends: 1622 [2023-02-16 03:05:48,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:05:48,337 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4566 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4566 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:48,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4566 Valid, 723 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 03:05:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2023-02-16 03:05:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 668. [2023-02-16 03:05:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 662 states have (on average 1.2507552870090635) internal successors, (828), 667 states have internal predecessors, (828), 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) [2023-02-16 03:05:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 828 transitions. [2023-02-16 03:05:48,347 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 828 transitions. Word has length 135 [2023-02-16 03:05:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:48,347 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 828 transitions. [2023-02-16 03:05:48,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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) [2023-02-16 03:05:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 828 transitions. [2023-02-16 03:05:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-02-16 03:05:48,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:48,349 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:48,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:48,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 03:05:48,554 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash -156264130, now seen corresponding path program 2 times [2023-02-16 03:05:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:48,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664202006] [2023-02-16 03:05:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664202006] [2023-02-16 03:05:50,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664202006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288437925] [2023-02-16 03:05:50,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:05:50,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:50,981 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) [2023-02-16 03:05:50,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:05:51,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:05:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:51,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:05:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:52,143 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_813 Int) (|v_ULTIMATE.start_main_~#src~0#1.base_27| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_18| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27| 1))) (and (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27|)) (= 0 (select .cse0 |v_ULTIMATE.start_main_~#dst~0#1.base_18|)) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#dst~0#1.base_18| v_ArrVal_813) |v_ULTIMATE.start_main_~#src~0#1.base_27| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_18| 0))))) is different from true [2023-02-16 03:05:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-02-16 03:05:52,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:05:52,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288437925] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:52,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:05:52,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2023-02-16 03:05:52,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922568054] [2023-02-16 03:05:52,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:52,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:52,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:52,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-16 03:05:52,149 INFO L87 Difference]: Start difference. First operand 668 states and 828 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:52,164 INFO L93 Difference]: Finished difference Result 667 states and 827 transitions. [2023-02-16 03:05:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2023-02-16 03:05:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:52,166 INFO L225 Difference]: With dead ends: 667 [2023-02-16 03:05:52,166 INFO L226 Difference]: Without dead ends: 665 [2023-02-16 03:05:52,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-16 03:05:52,167 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:52,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2023-02-16 03:05:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-02-16 03:05:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2023-02-16 03:05:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2015151515151514) internal successors, (793), 664 states have internal predecessors, (793), 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) [2023-02-16 03:05:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 793 transitions. [2023-02-16 03:05:52,175 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 793 transitions. Word has length 267 [2023-02-16 03:05:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:52,175 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 793 transitions. [2023-02-16 03:05:52,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 793 transitions. [2023-02-16 03:05:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-02-16 03:05:52,177 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:52,177 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:52,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:52,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 03:05:52,382 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:05:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:52,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2023-02-16 03:05:52,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:52,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037945800] [2023-02-16 03:05:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:52,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:05:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037945800] [2023-02-16 03:05:54,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037945800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874937639] [2023-02-16 03:05:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:54,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:54,748 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) [2023-02-16 03:05:54,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:05:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-16 03:05:54,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:05:55,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:05:58,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874937639] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:58,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:58,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-02-16 03:05:58,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631272087] [2023-02-16 03:05:58,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:58,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-16 03:05:58,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-16 03:05:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 03:05:58,938 INFO L87 Difference]: Start difference. First operand 665 states and 793 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 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) [2023-02-16 03:06:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:14,888 INFO L93 Difference]: Finished difference Result 2945 states and 3077 transitions. [2023-02-16 03:06:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-02-16 03:06:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 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 269 [2023-02-16 03:06:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:14,895 INFO L225 Difference]: With dead ends: 2945 [2023-02-16 03:06:14,895 INFO L226 Difference]: Without dead ends: 2945 [2023-02-16 03:06:14,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 03:06:14,898 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7917 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 1358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7917 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1358 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:14,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7917 Valid, 1060 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1358 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-16 03:06:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2023-02-16 03:06:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 929. [2023-02-16 03:06:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 924 states have (on average 1.143939393939394) internal successors, (1057), 928 states have internal predecessors, (1057), 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) [2023-02-16 03:06:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1057 transitions. [2023-02-16 03:06:14,913 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1057 transitions. Word has length 269 [2023-02-16 03:06:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:14,914 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1057 transitions. [2023-02-16 03:06:14,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 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) [2023-02-16 03:06:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1057 transitions. [2023-02-16 03:06:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-02-16 03:06:14,919 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:14,919 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:14,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:15,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-16 03:06:15,125 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:06:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2023-02-16 03:06:15,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:15,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266270293] [2023-02-16 03:06:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:15,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:06:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266270293] [2023-02-16 03:06:24,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266270293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793946027] [2023-02-16 03:06:24,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:06:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:24,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:24,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:06:24,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:06:24,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:24,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 03:06:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:24,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:06:24,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:06:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-02-16 03:06:29,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-02-16 03:06:38,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793946027] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:38,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:38,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2023-02-16 03:06:38,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009742217] [2023-02-16 03:06:38,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:38,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-02-16 03:06:38,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-02-16 03:06:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8788, Invalid=9844, Unknown=0, NotChecked=0, Total=18632 [2023-02-16 03:06:38,210 INFO L87 Difference]: Start difference. First operand 929 states and 1057 transitions. Second operand has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 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) [2023-02-16 03:07:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:07:15,081 INFO L93 Difference]: Finished difference Result 2716 states and 2850 transitions. [2023-02-16 03:07:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2023-02-16 03:07:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 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 533 [2023-02-16 03:07:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:07:15,088 INFO L225 Difference]: With dead ends: 2716 [2023-02-16 03:07:15,088 INFO L226 Difference]: Without dead ends: 2716 [2023-02-16 03:07:15,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1461 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43620 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=53602, Invalid=106798, Unknown=0, NotChecked=0, Total=160400 [2023-02-16 03:07:15,097 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13133 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 2992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13133 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 4677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2992 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:07:15,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13133 Valid, 1068 Invalid, 4677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2992 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-16 03:07:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2023-02-16 03:07:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 931. [2023-02-16 03:07:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 928 states have (on average 1.074353448275862) internal successors, (997), 930 states have internal predecessors, (997), 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) [2023-02-16 03:07:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 997 transitions. [2023-02-16 03:07:15,111 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 997 transitions. Word has length 533 [2023-02-16 03:07:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:07:15,111 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 997 transitions. [2023-02-16 03:07:15,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 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) [2023-02-16 03:07:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 997 transitions. [2023-02-16 03:07:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2023-02-16 03:07:15,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:07:15,117 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:07:15,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:07:15,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 03:07:15,322 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-16 03:07:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:07:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2141103496, now seen corresponding path program 1 times [2023-02-16 03:07:15,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:07:15,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163670325] [2023-02-16 03:07:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:07:15,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:07:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:07:24,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:07:24,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163670325] [2023-02-16 03:07:24,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163670325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:07:24,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976929567] [2023-02-16 03:07:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:07:24,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:07:24,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:07:24,432 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:07:24,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:07:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 133 conjunts are in the unsatisfiable core [2023-02-16 03:07:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:07:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:07:25,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:07:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:07:40,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976929567] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:07:40,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:07:40,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134, 134] total 267 [2023-02-16 03:07:40,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774401733] [2023-02-16 03:07:40,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:07:40,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 267 states [2023-02-16 03:07:40,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:07:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 267 interpolants. [2023-02-16 03:07:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35511, Invalid=35511, Unknown=0, NotChecked=0, Total=71022 [2023-02-16 03:07:40,264 INFO L87 Difference]: Start difference. First operand 931 states and 997 transitions. Second operand has 267 states, 267 states have (on average 4.00374531835206) internal successors, (1069), 267 states have internal predecessors, (1069), 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)