./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a31fd051 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/memsafety-ext/tree_of_cslls.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 e174a1790a7df4dcba920aa7097618d66c8703aa13de1aa6af1a2c5f7cb0971c --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 13:00:32,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 13:00:32,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 13:00:32,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 13:00:32,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 13:00:32,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 13:00:32,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 13:00:32,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 13:00:32,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 13:00:32,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 13:00:32,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 13:00:32,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 13:00:32,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 13:00:32,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 13:00:32,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 13:00:32,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 13:00:32,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 13:00:32,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 13:00:32,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 13:00:32,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 13:00:32,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 13:00:32,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 13:00:32,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 13:00:32,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 13:00:32,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 13:00:32,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 13:00:32,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 13:00:32,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 13:00:32,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 13:00:32,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 13:00:32,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 13:00:32,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 13:00:32,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 13:00:32,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 13:00:32,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 13:00:32,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 13:00:32,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 13:00:32,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 13:00:32,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 13:00:32,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 13:00:32,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 13:00:32,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 13:00:32,863 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 13:00:32,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 13:00:32,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 13:00:32,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 13:00:32,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 13:00:32,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 13:00:32,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 13:00:32,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 13:00:32,866 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 13:00:32,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 13:00:32,867 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 13:00:32,868 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 13:00:32,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 13:00:32,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 13:00:32,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 13:00:32,868 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 13:00:32,869 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 13:00:32,869 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 13:00:32,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 13:00:32,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 13:00:32,869 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 13:00:32,869 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 13:00:32,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 13:00:32,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 13:00:32,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 13:00:32,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:00:32,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 13:00:32,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 13:00:32,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 13:00:32,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 13:00:32,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 13:00:32,872 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 13:00:32,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 13:00:32,872 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 13:00:32,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e174a1790a7df4dcba920aa7097618d66c8703aa13de1aa6af1a2c5f7cb0971c [2023-02-15 13:00:33,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 13:00:33,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 13:00:33,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 13:00:33,092 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 13:00:33,092 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 13:00:33,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2023-02-15 13:00:34,260 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 13:00:34,458 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 13:00:34,459 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2023-02-15 13:00:34,474 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1afb49e81/6b92bc9900ec49a88c8c4bce0f422fcd/FLAGbcd75b696 [2023-02-15 13:00:34,493 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1afb49e81/6b92bc9900ec49a88c8c4bce0f422fcd [2023-02-15 13:00:34,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 13:00:34,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 13:00:34,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 13:00:34,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 13:00:34,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 13:00:34,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e15b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34, skipping insertion in model container [2023-02-15 13:00:34,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 13:00:34,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 13:00:34,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:00:34,842 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 13:00:34,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:00:34,911 INFO L208 MainTranslator]: Completed translation [2023-02-15 13:00:34,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34 WrapperNode [2023-02-15 13:00:34,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 13:00:34,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 13:00:34,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 13:00:34,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 13:00:34,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,958 INFO L138 Inliner]: procedures = 123, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 216 [2023-02-15 13:00:34,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 13:00:34,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 13:00:34,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 13:00:34,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 13:00:34,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,987 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 13:00:34,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 13:00:34,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 13:00:34,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 13:00:34,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (1/1) ... [2023-02-15 13:00:34,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:00:35,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:00:35,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 13:00:35,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 13:00:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 13:00:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 13:00:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 13:00:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 13:00:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 13:00:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 13:00:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 13:00:35,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 13:00:35,173 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 13:00:35,175 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 13:00:35,720 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 13:00:35,729 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 13:00:35,729 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2023-02-15 13:00:35,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:00:35 BoogieIcfgContainer [2023-02-15 13:00:35,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 13:00:35,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 13:00:35,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 13:00:35,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 13:00:35,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:00:34" (1/3) ... [2023-02-15 13:00:35,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b44240e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:00:35, skipping insertion in model container [2023-02-15 13:00:35,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:00:34" (2/3) ... [2023-02-15 13:00:35,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b44240e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:00:35, skipping insertion in model container [2023-02-15 13:00:35,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:00:35" (3/3) ... [2023-02-15 13:00:35,747 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_of_cslls.i [2023-02-15 13:00:35,764 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 13:00:35,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 104 error locations. [2023-02-15 13:00:35,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 13:00:35,822 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;@5dff5d9e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 13:00:35,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-02-15 13:00:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 105 states have (on average 2.219047619047619) internal successors, (233), 209 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 13:00:35,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:35,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 13:00:35,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:35,836 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-15 13:00:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:35,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378933042] [2023-02-15 13:00:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:36,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:36,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378933042] [2023-02-15 13:00:36,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378933042] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:36,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:36,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:00:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722379699] [2023-02-15 13:00:36,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:36,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:00:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:36,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:00:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:36,075 INFO L87 Difference]: Start difference. First operand has 210 states, 105 states have (on average 2.219047619047619) internal successors, (233), 209 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:36,327 INFO L93 Difference]: Finished difference Result 282 states and 304 transitions. [2023-02-15 13:00:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:00:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-15 13:00:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:36,349 INFO L225 Difference]: With dead ends: 282 [2023-02-15 13:00:36,350 INFO L226 Difference]: Without dead ends: 278 [2023-02-15 13:00:36,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:36,356 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 200 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:36,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 199 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:00:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-02-15 13:00:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 199. [2023-02-15 13:00:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 198 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 215 transitions. [2023-02-15 13:00:36,392 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 215 transitions. Word has length 3 [2023-02-15 13:00:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:36,393 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 215 transitions. [2023-02-15 13:00:36,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 215 transitions. [2023-02-15 13:00:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 13:00:36,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:36,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 13:00:36,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 13:00:36,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-15 13:00:36,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:36,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480531460] [2023-02-15 13:00:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:36,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480531460] [2023-02-15 13:00:36,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480531460] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:36,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:36,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:00:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700115865] [2023-02-15 13:00:36,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:36,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:00:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:00:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:36,467 INFO L87 Difference]: Start difference. First operand 199 states and 215 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:36,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:36,612 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2023-02-15 13:00:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:00:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-15 13:00:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:36,614 INFO L225 Difference]: With dead ends: 197 [2023-02-15 13:00:36,614 INFO L226 Difference]: Without dead ends: 197 [2023-02-15 13:00:36,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:36,620 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 2 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:36,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 319 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:00:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-15 13:00:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-02-15 13:00:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 104 states have (on average 2.048076923076923) internal successors, (213), 196 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2023-02-15 13:00:36,640 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 3 [2023-02-15 13:00:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:36,640 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2023-02-15 13:00:36,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2023-02-15 13:00:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:00:36,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:36,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:00:36,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 13:00:36,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2023-02-15 13:00:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:36,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473571376] [2023-02-15 13:00:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:36,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:36,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473571376] [2023-02-15 13:00:36,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473571376] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:36,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:36,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:00:36,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935022167] [2023-02-15 13:00:36,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:36,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:00:36,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:00:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:00:36,851 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:37,177 INFO L93 Difference]: Finished difference Result 354 states and 382 transitions. [2023-02-15 13:00:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:00:37,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 13:00:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:37,180 INFO L225 Difference]: With dead ends: 354 [2023-02-15 13:00:37,180 INFO L226 Difference]: Without dead ends: 354 [2023-02-15 13:00:37,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:00:37,183 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 279 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:37,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 232 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:00:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-02-15 13:00:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 190. [2023-02-15 13:00:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 104 states have (on average 1.9807692307692308) internal successors, (206), 189 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 206 transitions. [2023-02-15 13:00:37,193 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 206 transitions. Word has length 6 [2023-02-15 13:00:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:37,194 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 206 transitions. [2023-02-15 13:00:37,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 206 transitions. [2023-02-15 13:00:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 13:00:37,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:37,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:37,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 13:00:37,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1113924364, now seen corresponding path program 1 times [2023-02-15 13:00:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:37,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112525402] [2023-02-15 13:00:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:37,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112525402] [2023-02-15 13:00:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112525402] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:37,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:37,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:00:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204650200] [2023-02-15 13:00:37,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:37,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:00:37,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:00:37,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:00:37,371 INFO L87 Difference]: Start difference. First operand 190 states and 206 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:37,573 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2023-02-15 13:00:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:00:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 13:00:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:37,574 INFO L225 Difference]: With dead ends: 189 [2023-02-15 13:00:37,574 INFO L226 Difference]: Without dead ends: 189 [2023-02-15 13:00:37,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:00:37,575 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:37,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 508 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:00:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-15 13:00:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-02-15 13:00:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 188 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 205 transitions. [2023-02-15 13:00:37,581 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 205 transitions. Word has length 10 [2023-02-15 13:00:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:37,581 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 205 transitions. [2023-02-15 13:00:37,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 205 transitions. [2023-02-15 13:00:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 13:00:37,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:37,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 13:00:37,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1113924365, now seen corresponding path program 1 times [2023-02-15 13:00:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51576795] [2023-02-15 13:00:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:37,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51576795] [2023-02-15 13:00:37,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51576795] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:37,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:37,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:00:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920787940] [2023-02-15 13:00:37,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:37,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:00:37,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:37,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:00:37,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:00:37,789 INFO L87 Difference]: Start difference. First operand 189 states and 205 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:38,002 INFO L93 Difference]: Finished difference Result 188 states and 204 transitions. [2023-02-15 13:00:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:00:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 13:00:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:38,003 INFO L225 Difference]: With dead ends: 188 [2023-02-15 13:00:38,003 INFO L226 Difference]: Without dead ends: 188 [2023-02-15 13:00:38,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:00:38,004 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 4 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:38,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 529 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:00:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-15 13:00:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-02-15 13:00:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 104 states have (on average 1.9615384615384615) internal successors, (204), 187 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 204 transitions. [2023-02-15 13:00:38,014 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 204 transitions. Word has length 10 [2023-02-15 13:00:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:38,015 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 204 transitions. [2023-02-15 13:00:38,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 204 transitions. [2023-02-15 13:00:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 13:00:38,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:38,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:38,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 13:00:38,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1114596085, now seen corresponding path program 1 times [2023-02-15 13:00:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:38,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905500650] [2023-02-15 13:00:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:38,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905500650] [2023-02-15 13:00:38,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905500650] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:38,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:38,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:00:38,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731969187] [2023-02-15 13:00:38,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:38,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:00:38,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:00:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:00:38,300 INFO L87 Difference]: Start difference. First operand 188 states and 204 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2023-02-15 13:00:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:38,734 INFO L93 Difference]: Finished difference Result 353 states and 389 transitions. [2023-02-15 13:00:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:00:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 13:00:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:38,736 INFO L225 Difference]: With dead ends: 353 [2023-02-15 13:00:38,737 INFO L226 Difference]: Without dead ends: 353 [2023-02-15 13:00:38,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:00:38,738 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 474 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:38,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 675 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:00:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-02-15 13:00:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2023-02-15 13:00:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 108 states have (on average 1.9444444444444444) internal successors, (210), 191 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 210 transitions. [2023-02-15 13:00:38,743 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 210 transitions. Word has length 15 [2023-02-15 13:00:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:38,744 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 210 transitions. [2023-02-15 13:00:38,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2023-02-15 13:00:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 210 transitions. [2023-02-15 13:00:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 13:00:38,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:38,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:38,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 13:00:38,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1114596086, now seen corresponding path program 1 times [2023-02-15 13:00:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724505882] [2023-02-15 13:00:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:38,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:39,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724505882] [2023-02-15 13:00:39,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724505882] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:39,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:39,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:00:39,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708495270] [2023-02-15 13:00:39,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:00:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:00:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:00:39,026 INFO L87 Difference]: Start difference. First operand 192 states and 210 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2023-02-15 13:00:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:39,530 INFO L93 Difference]: Finished difference Result 347 states and 383 transitions. [2023-02-15 13:00:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:00:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 13:00:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:39,532 INFO L225 Difference]: With dead ends: 347 [2023-02-15 13:00:39,532 INFO L226 Difference]: Without dead ends: 347 [2023-02-15 13:00:39,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:00:39,533 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 454 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:39,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 490 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:00:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-02-15 13:00:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 192. [2023-02-15 13:00:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 108 states have (on average 1.9351851851851851) internal successors, (209), 191 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 209 transitions. [2023-02-15 13:00:39,537 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 209 transitions. Word has length 15 [2023-02-15 13:00:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:39,537 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 209 transitions. [2023-02-15 13:00:39,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2023-02-15 13:00:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 209 transitions. [2023-02-15 13:00:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 13:00:39,538 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:39,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 13:00:39,538 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash 192740277, now seen corresponding path program 1 times [2023-02-15 13:00:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:39,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542946387] [2023-02-15 13:00:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:39,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:39,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542946387] [2023-02-15 13:00:39,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542946387] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:39,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:39,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:00:39,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892120817] [2023-02-15 13:00:39,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:39,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:00:39,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:00:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:39,606 INFO L87 Difference]: Start difference. First operand 192 states and 209 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:39,764 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2023-02-15 13:00:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:00:39,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-15 13:00:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:39,766 INFO L225 Difference]: With dead ends: 316 [2023-02-15 13:00:39,766 INFO L226 Difference]: Without dead ends: 316 [2023-02-15 13:00:39,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:39,767 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 168 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:39,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 348 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:00:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-02-15 13:00:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 189. [2023-02-15 13:00:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 108 states have (on average 1.9074074074074074) internal successors, (206), 188 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 206 transitions. [2023-02-15 13:00:39,771 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 206 transitions. Word has length 16 [2023-02-15 13:00:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:39,771 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 206 transitions. [2023-02-15 13:00:39,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 206 transitions. [2023-02-15 13:00:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 13:00:39,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:39,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 13:00:39,776 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 192740278, now seen corresponding path program 1 times [2023-02-15 13:00:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:39,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251688266] [2023-02-15 13:00:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:39,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251688266] [2023-02-15 13:00:39,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251688266] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:39,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:39,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:00:39,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776701484] [2023-02-15 13:00:39,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:39,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:00:39,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:39,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:00:39,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:39,844 INFO L87 Difference]: Start difference. First operand 189 states and 206 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:39,985 INFO L93 Difference]: Finished difference Result 293 states and 325 transitions. [2023-02-15 13:00:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:00:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-15 13:00:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:39,987 INFO L225 Difference]: With dead ends: 293 [2023-02-15 13:00:39,987 INFO L226 Difference]: Without dead ends: 293 [2023-02-15 13:00:39,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:39,988 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 139 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:39,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 359 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:00:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-02-15 13:00:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 187. [2023-02-15 13:00:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 108 states have (on average 1.8888888888888888) internal successors, (204), 186 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2023-02-15 13:00:39,992 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 16 [2023-02-15 13:00:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:39,995 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2023-02-15 13:00:39,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2023-02-15 13:00:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 13:00:39,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:39,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:39,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 13:00:39,997 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1678809590, now seen corresponding path program 1 times [2023-02-15 13:00:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:39,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741919779] [2023-02-15 13:00:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:39,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:40,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741919779] [2023-02-15 13:00:40,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741919779] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:40,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:40,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:00:40,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353609728] [2023-02-15 13:00:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:40,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:00:40,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:00:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:00:40,046 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:40,245 INFO L93 Difference]: Finished difference Result 254 states and 278 transitions. [2023-02-15 13:00:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:00:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 13:00:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:40,247 INFO L225 Difference]: With dead ends: 254 [2023-02-15 13:00:40,247 INFO L226 Difference]: Without dead ends: 254 [2023-02-15 13:00:40,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:00:40,248 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 327 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:40,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 153 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:00:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-02-15 13:00:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 176. [2023-02-15 13:00:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.7589285714285714) internal successors, (197), 175 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2023-02-15 13:00:40,252 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 17 [2023-02-15 13:00:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:40,252 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2023-02-15 13:00:40,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2023-02-15 13:00:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 13:00:40,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:40,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:40,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 13:00:40,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:40,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1678809591, now seen corresponding path program 1 times [2023-02-15 13:00:40,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:40,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219971548] [2023-02-15 13:00:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:40,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219971548] [2023-02-15 13:00:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219971548] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:40,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:40,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:00:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180249420] [2023-02-15 13:00:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:40,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:00:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:00:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:00:40,351 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:40,685 INFO L93 Difference]: Finished difference Result 438 states and 492 transitions. [2023-02-15 13:00:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:00:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 13:00:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:40,687 INFO L225 Difference]: With dead ends: 438 [2023-02-15 13:00:40,687 INFO L226 Difference]: Without dead ends: 438 [2023-02-15 13:00:40,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:00:40,688 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 710 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:40,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 293 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:00:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-02-15 13:00:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 318. [2023-02-15 13:00:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 254 states have (on average 1.7598425196850394) internal successors, (447), 317 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 447 transitions. [2023-02-15 13:00:40,695 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 447 transitions. Word has length 17 [2023-02-15 13:00:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:40,695 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 447 transitions. [2023-02-15 13:00:40,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 447 transitions. [2023-02-15 13:00:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 13:00:40,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:40,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:40,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 13:00:40,697 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash -445669701, now seen corresponding path program 1 times [2023-02-15 13:00:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:40,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827594889] [2023-02-15 13:00:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:40,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:40,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827594889] [2023-02-15 13:00:40,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827594889] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:40,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:40,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:00:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906485027] [2023-02-15 13:00:40,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:40,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:00:40,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:40,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:00:40,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:00:40,817 INFO L87 Difference]: Start difference. First operand 318 states and 447 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:41,355 INFO L93 Difference]: Finished difference Result 784 states and 1126 transitions. [2023-02-15 13:00:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:00:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 13:00:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:41,358 INFO L225 Difference]: With dead ends: 784 [2023-02-15 13:00:41,358 INFO L226 Difference]: Without dead ends: 784 [2023-02-15 13:00:41,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:00:41,359 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 370 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:41,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1218 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 13:00:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-02-15 13:00:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 317. [2023-02-15 13:00:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 254 states have (on average 1.7559055118110236) internal successors, (446), 316 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 446 transitions. [2023-02-15 13:00:41,370 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 446 transitions. Word has length 19 [2023-02-15 13:00:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:41,370 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 446 transitions. [2023-02-15 13:00:41,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 446 transitions. [2023-02-15 13:00:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 13:00:41,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:41,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:41,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 13:00:41,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash -445669700, now seen corresponding path program 1 times [2023-02-15 13:00:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:41,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279856376] [2023-02-15 13:00:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:41,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:41,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:41,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279856376] [2023-02-15 13:00:41,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279856376] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:41,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:41,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:00:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643563491] [2023-02-15 13:00:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:00:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:00:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:00:41,708 INFO L87 Difference]: Start difference. First operand 317 states and 446 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:42,323 INFO L93 Difference]: Finished difference Result 603 states and 842 transitions. [2023-02-15 13:00:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:00:42,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 13:00:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:42,325 INFO L225 Difference]: With dead ends: 603 [2023-02-15 13:00:42,325 INFO L226 Difference]: Without dead ends: 603 [2023-02-15 13:00:42,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-02-15 13:00:42,326 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 391 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:42,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 926 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 13:00:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-02-15 13:00:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 321. [2023-02-15 13:00:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 258 states have (on average 1.744186046511628) internal successors, (450), 320 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2023-02-15 13:00:42,333 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 19 [2023-02-15 13:00:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:42,333 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2023-02-15 13:00:42,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2023-02-15 13:00:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 13:00:42,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:42,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:42,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 13:00:42,334 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1571609538, now seen corresponding path program 1 times [2023-02-15 13:00:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:42,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492537401] [2023-02-15 13:00:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:42,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:42,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492537401] [2023-02-15 13:00:42,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492537401] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:42,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:42,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:00:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922623413] [2023-02-15 13:00:42,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:42,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:00:42,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:00:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:42,368 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:42,383 INFO L93 Difference]: Finished difference Result 395 states and 528 transitions. [2023-02-15 13:00:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:00:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 13:00:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:42,385 INFO L225 Difference]: With dead ends: 395 [2023-02-15 13:00:42,385 INFO L226 Difference]: Without dead ends: 395 [2023-02-15 13:00:42,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:42,386 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 163 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:42,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 296 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:00:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-02-15 13:00:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 361. [2023-02-15 13:00:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 298 states have (on average 1.7718120805369129) internal successors, (528), 360 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 528 transitions. [2023-02-15 13:00:42,394 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 528 transitions. Word has length 19 [2023-02-15 13:00:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:42,394 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 528 transitions. [2023-02-15 13:00:42,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 528 transitions. [2023-02-15 13:00:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 13:00:42,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:42,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:42,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 13:00:42,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash -727311539, now seen corresponding path program 1 times [2023-02-15 13:00:42,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:42,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285931064] [2023-02-15 13:00:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:42,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:42,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285931064] [2023-02-15 13:00:42,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285931064] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:00:42,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:00:42,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:00:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998420291] [2023-02-15 13:00:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:00:42,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:00:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:00:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:00:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:42,436 INFO L87 Difference]: Start difference. First operand 361 states and 528 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:00:42,444 INFO L93 Difference]: Finished difference Result 365 states and 532 transitions. [2023-02-15 13:00:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:00:42,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-02-15 13:00:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:00:42,445 INFO L225 Difference]: With dead ends: 365 [2023-02-15 13:00:42,446 INFO L226 Difference]: Without dead ends: 365 [2023-02-15 13:00:42,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:00:42,446 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 0 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:00:42,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:00:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-02-15 13:00:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2023-02-15 13:00:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 302 states have (on average 1.7615894039735098) internal successors, (532), 364 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 532 transitions. [2023-02-15 13:00:42,453 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 532 transitions. Word has length 23 [2023-02-15 13:00:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:00:42,454 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 532 transitions. [2023-02-15 13:00:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:00:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 532 transitions. [2023-02-15 13:00:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 13:00:42,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:00:42,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:00:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 13:00:42,455 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-02-15 13:00:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:00:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash 97933121, now seen corresponding path program 1 times [2023-02-15 13:00:42,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:00:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328922837] [2023-02-15 13:00:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:00:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:42,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:00:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328922837] [2023-02-15 13:00:42,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328922837] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:00:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864608747] [2023-02-15 13:00:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:00:42,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:00:42,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:00:42,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:00:42,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 13:00:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:00:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 13:00:42,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:00:42,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:00:42,925 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:00:42,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:00:42,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:00:43,019 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:00:43,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-02-15 13:00:43,046 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:00:43,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:00:43,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-15 13:00:43,210 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:00:43,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-02-15 13:00:43,292 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2023-02-15 13:00:43,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2023-02-15 13:00:43,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-02-15 13:00:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:00:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:00:43,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:00:43,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 70 [2023-02-15 13:00:43,830 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:00:43,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 380 treesize of output 320 [2023-02-15 13:00:43,886 INFO L321 Elim1Store]: treesize reduction 124, result has 23.0 percent of original size [2023-02-15 13:00:43,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 851 treesize of output 821 [2023-02-15 13:00:43,898 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 755 treesize of output 607 [2023-02-15 13:00:43,904 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 601 treesize of output 497