./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0214.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e1ff0e6 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/test-0214.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 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 01:01:41,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 01:01:41,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 01:01:41,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 01:01:41,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 01:01:41,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 01:01:41,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 01:01:41,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 01:01:41,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 01:01:41,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 01:01:41,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 01:01:41,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 01:01:41,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 01:01:41,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 01:01:41,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 01:01:41,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 01:01:41,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 01:01:41,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 01:01:41,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 01:01:41,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 01:01:41,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 01:01:41,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 01:01:41,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 01:01:41,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 01:01:41,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 01:01:41,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 01:01:41,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 01:01:41,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 01:01:41,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 01:01:41,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 01:01:41,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 01:01:41,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 01:01:41,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 01:01:41,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 01:01:41,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 01:01:41,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 01:01:41,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 01:01:41,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 01:01:41,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 01:01:41,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 01:01:41,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 01:01:41,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 01:01:41,836 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 01:01:41,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 01:01:41,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 01:01:41,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 01:01:41,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 01:01:41,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 01:01:41,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 01:01:41,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 01:01:41,846 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 01:01:41,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 01:01:41,847 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 01:01:41,847 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 01:01:41,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 01:01:41,848 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 01:01:41,849 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 01:01:41,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 01:01:41,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 01:01:41,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 01:01:41,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:01:41,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 01:01:41,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 01:01:41,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 01:01:41,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 01:01:41,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 01:01:41,850 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 01:01:41,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 01:01:41,850 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 01:01:41,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 [2023-02-15 01:01:42,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 01:01:42,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 01:01:42,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 01:01:42,075 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 01:01:42,076 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 01:01:42,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0214.i [2023-02-15 01:01:43,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 01:01:43,235 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 01:01:43,235 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0214.i [2023-02-15 01:01:43,246 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9802a42/79e8abb3536d486e97419a3a4861c8c9/FLAG7d33cd74c [2023-02-15 01:01:43,262 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9802a42/79e8abb3536d486e97419a3a4861c8c9 [2023-02-15 01:01:43,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 01:01:43,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 01:01:43,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 01:01:43,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 01:01:43,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 01:01:43,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7660a02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43, skipping insertion in model container [2023-02-15 01:01:43,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 01:01:43,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 01:01:43,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:01:43,570 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 01:01:43,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:01:43,669 INFO L208 MainTranslator]: Completed translation [2023-02-15 01:01:43,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43 WrapperNode [2023-02-15 01:01:43,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 01:01:43,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 01:01:43,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 01:01:43,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 01:01:43,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,722 INFO L138 Inliner]: procedures = 181, calls = 42, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 173 [2023-02-15 01:01:43,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 01:01:43,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 01:01:43,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 01:01:43,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 01:01:43,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 01:01:43,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 01:01:43,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 01:01:43,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 01:01:43,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (1/1) ... [2023-02-15 01:01:43,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:01:43,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:01:43,785 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 01:01:43,801 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 01:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-15 01:01:43,831 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-15 01:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 01:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 01:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 01:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 01:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 01:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 01:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 01:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 01:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 01:01:43,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 01:01:43,944 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 01:01:43,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 01:01:44,378 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 01:01:44,383 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 01:01:44,383 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 01:01:44,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:01:44 BoogieIcfgContainer [2023-02-15 01:01:44,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 01:01:44,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 01:01:44,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 01:01:44,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 01:01:44,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:01:43" (1/3) ... [2023-02-15 01:01:44,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46406f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:01:44, skipping insertion in model container [2023-02-15 01:01:44,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:43" (2/3) ... [2023-02-15 01:01:44,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46406f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:01:44, skipping insertion in model container [2023-02-15 01:01:44,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:01:44" (3/3) ... [2023-02-15 01:01:44,392 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214.i [2023-02-15 01:01:44,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 01:01:44,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-02-15 01:01:44,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 01:01:44,445 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;@52f3322b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 01:01:44,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-02-15 01:01:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 138 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:01:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 01:01:44,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:44,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 01:01:44,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948778, now seen corresponding path program 1 times [2023-02-15 01:01:44,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:44,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331178624] [2023-02-15 01:01:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:44,589 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 01:01:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331178624] [2023-02-15 01:01:44,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331178624] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:44,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:44,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370881590] [2023-02-15 01:01:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:44,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 01:01:44,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:44,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 01:01:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 01:01:44,640 INFO L87 Difference]: Start difference. First operand has 142 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 138 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 01:01:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:44,671 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2023-02-15 01:01:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 01:01:44,673 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 01:01:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:44,682 INFO L225 Difference]: With dead ends: 142 [2023-02-15 01:01:44,682 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 01:01:44,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 01:01:44,687 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:44,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:01:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 01:01:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-02-15 01:01:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 80 states have (on average 1.8875) internal successors, (151), 136 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:01:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2023-02-15 01:01:44,734 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 6 [2023-02-15 01:01:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:44,734 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2023-02-15 01:01:44,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 01:01:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2023-02-15 01:01:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:01:44,735 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:44,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:44,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 01:01:44,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:44,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381875, now seen corresponding path program 1 times [2023-02-15 01:01:44,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:44,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693997683] [2023-02-15 01:01:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:44,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:44,830 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 01:01:44,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693997683] [2023-02-15 01:01:44,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693997683] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:44,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:44,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-15 01:01:44,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829311785] [2023-02-15 01:01:44,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:01:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:01:44,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:01:44,835 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 01:01:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:45,019 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2023-02-15 01:01:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:01:45,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-15 01:01:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:45,023 INFO L225 Difference]: With dead ends: 271 [2023-02-15 01:01:45,024 INFO L226 Difference]: Without dead ends: 271 [2023-02-15 01:01:45,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 01:01:45,027 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 136 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:45,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 197 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-15 01:01:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 189. [2023-02-15 01:01:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 126 states have (on average 1.8571428571428572) internal successors, (234), 182 states have internal predecessors, (234), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 242 transitions. [2023-02-15 01:01:45,048 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 242 transitions. Word has length 7 [2023-02-15 01:01:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:45,051 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 242 transitions. [2023-02-15 01:01:45,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 01:01:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 242 transitions. [2023-02-15 01:01:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:01:45,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:45,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 01:01:45,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381874, now seen corresponding path program 1 times [2023-02-15 01:01:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:45,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934801264] [2023-02-15 01:01:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:45,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:45,195 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 01:01:45,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:45,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934801264] [2023-02-15 01:01:45,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934801264] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:45,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:45,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240959468] [2023-02-15 01:01:45,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:45,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:45,198 INFO L87 Difference]: Start difference. First operand 189 states and 242 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 01:01:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:45,339 INFO L93 Difference]: Finished difference Result 334 states and 412 transitions. [2023-02-15 01:01:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-15 01:01:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:45,342 INFO L225 Difference]: With dead ends: 334 [2023-02-15 01:01:45,342 INFO L226 Difference]: Without dead ends: 334 [2023-02-15 01:01:45,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 01:01:45,347 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 139 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:45,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 329 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-02-15 01:01:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 262. [2023-02-15 01:01:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 193 states have (on average 1.8186528497409327) internal successors, (351), 251 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:01:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 367 transitions. [2023-02-15 01:01:45,366 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 367 transitions. Word has length 7 [2023-02-15 01:01:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:45,367 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 367 transitions. [2023-02-15 01:01:45,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 01:01:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 367 transitions. [2023-02-15 01:01:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:01:45,367 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:45,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:45,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 01:01:45,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381812, now seen corresponding path program 1 times [2023-02-15 01:01:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:45,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490660880] [2023-02-15 01:01:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:45,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:45,455 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 01:01:45,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:45,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490660880] [2023-02-15 01:01:45,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490660880] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:45,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:45,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184603604] [2023-02-15 01:01:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:45,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:45,457 INFO L87 Difference]: Start difference. First operand 262 states and 367 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 01:01:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:45,596 INFO L93 Difference]: Finished difference Result 333 states and 410 transitions. [2023-02-15 01:01:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-15 01:01:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:45,598 INFO L225 Difference]: With dead ends: 333 [2023-02-15 01:01:45,598 INFO L226 Difference]: Without dead ends: 333 [2023-02-15 01:01:45,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 01:01:45,603 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 121 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:45,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 343 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-02-15 01:01:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 262. [2023-02-15 01:01:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 193 states have (on average 1.8186528497409327) internal successors, (351), 251 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:01:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 367 transitions. [2023-02-15 01:01:45,613 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 367 transitions. Word has length 7 [2023-02-15 01:01:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:45,614 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 367 transitions. [2023-02-15 01:01:45,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 01:01:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 367 transitions. [2023-02-15 01:01:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 01:01:45,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:45,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:45,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 01:01:45,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash -251697362, now seen corresponding path program 1 times [2023-02-15 01:01:45,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:45,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340575419] [2023-02-15 01:01:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:45,789 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 01:01:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340575419] [2023-02-15 01:01:45,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340575419] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:45,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:45,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688968649] [2023-02-15 01:01:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:45,791 INFO L87 Difference]: Start difference. First operand 262 states and 367 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) 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 01:01:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:45,952 INFO L93 Difference]: Finished difference Result 379 states and 501 transitions. [2023-02-15 01:01:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:01:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) 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 01:01:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:45,955 INFO L225 Difference]: With dead ends: 379 [2023-02-15 01:01:45,955 INFO L226 Difference]: Without dead ends: 379 [2023-02-15 01:01:45,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:01:45,956 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 124 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:45,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 642 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-02-15 01:01:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 304. [2023-02-15 01:01:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 232 states have (on average 1.8017241379310345) internal successors, (418), 291 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 438 transitions. [2023-02-15 01:01:45,962 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 438 transitions. Word has length 10 [2023-02-15 01:01:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:45,962 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 438 transitions. [2023-02-15 01:01:45,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) 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 01:01:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 438 transitions. [2023-02-15 01:01:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 01:01:45,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:45,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:45,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 01:01:45,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -249850320, now seen corresponding path program 1 times [2023-02-15 01:01:45,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:45,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769510448] [2023-02-15 01:01:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:45,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,066 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 01:01:46,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:46,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769510448] [2023-02-15 01:01:46,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769510448] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:46,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:46,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:46,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136039432] [2023-02-15 01:01:46,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:46,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:46,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:46,069 INFO L87 Difference]: Start difference. First operand 304 states and 438 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) 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 01:01:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:46,177 INFO L93 Difference]: Finished difference Result 369 states and 490 transitions. [2023-02-15 01:01:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:01:46,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) 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 01:01:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:46,179 INFO L225 Difference]: With dead ends: 369 [2023-02-15 01:01:46,179 INFO L226 Difference]: Without dead ends: 369 [2023-02-15 01:01:46,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:46,180 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 103 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:46,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 659 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-02-15 01:01:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 303. [2023-02-15 01:01:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 231 states have (on average 1.8051948051948052) internal successors, (417), 290 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 437 transitions. [2023-02-15 01:01:46,187 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 437 transitions. Word has length 10 [2023-02-15 01:01:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:46,188 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 437 transitions. [2023-02-15 01:01:46,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) 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 01:01:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 437 transitions. [2023-02-15 01:01:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 01:01:46,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:46,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:46,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 01:01:46,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash 787315061, now seen corresponding path program 1 times [2023-02-15 01:01:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711651366] [2023-02-15 01:01:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:46,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,218 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 01:01:46,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:46,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711651366] [2023-02-15 01:01:46,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711651366] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:46,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:46,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697052149] [2023-02-15 01:01:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:01:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:01:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:01:46,221 INFO L87 Difference]: Start difference. First operand 303 states and 437 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:46,279 INFO L93 Difference]: Finished difference Result 358 states and 488 transitions. [2023-02-15 01:01:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:01:46,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 01:01:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:46,281 INFO L225 Difference]: With dead ends: 358 [2023-02-15 01:01:46,281 INFO L226 Difference]: Without dead ends: 351 [2023-02-15 01:01:46,281 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 01:01:46,282 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 68 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:46,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 225 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-02-15 01:01:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 300. [2023-02-15 01:01:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 228 states have (on average 1.8070175438596492) internal successors, (412), 287 states have internal predecessors, (412), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 432 transitions. [2023-02-15 01:01:46,288 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 432 transitions. Word has length 11 [2023-02-15 01:01:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:46,289 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 432 transitions. [2023-02-15 01:01:46,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:46,289 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 432 transitions. [2023-02-15 01:01:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 01:01:46,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:46,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:46,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 01:01:46,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1918130468, now seen corresponding path program 1 times [2023-02-15 01:01:46,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:46,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468316354] [2023-02-15 01:01:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:46,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,340 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 01:01:46,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:46,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468316354] [2023-02-15 01:01:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468316354] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:46,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439425798] [2023-02-15 01:01:46,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:46,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:46,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:46,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:46,343 INFO L87 Difference]: Start difference. First operand 300 states and 432 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:46,497 INFO L93 Difference]: Finished difference Result 423 states and 528 transitions. [2023-02-15 01:01:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:46,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 01:01:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:46,499 INFO L225 Difference]: With dead ends: 423 [2023-02-15 01:01:46,500 INFO L226 Difference]: Without dead ends: 423 [2023-02-15 01:01:46,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:46,501 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 255 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:46,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 329 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-02-15 01:01:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 300. [2023-02-15 01:01:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 228 states have (on average 1.780701754385965) internal successors, (406), 287 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 426 transitions. [2023-02-15 01:01:46,509 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 426 transitions. Word has length 13 [2023-02-15 01:01:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:46,510 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 426 transitions. [2023-02-15 01:01:46,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 426 transitions. [2023-02-15 01:01:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 01:01:46,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:46,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:46,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 01:01:46,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1918130467, now seen corresponding path program 1 times [2023-02-15 01:01:46,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:46,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256629130] [2023-02-15 01:01:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:46,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,643 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 01:01:46,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256629130] [2023-02-15 01:01:46,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256629130] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:46,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:46,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:46,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989892251] [2023-02-15 01:01:46,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:46,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:46,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:46,646 INFO L87 Difference]: Start difference. First operand 300 states and 426 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:46,834 INFO L93 Difference]: Finished difference Result 370 states and 472 transitions. [2023-02-15 01:01:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:01:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 01:01:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:46,836 INFO L225 Difference]: With dead ends: 370 [2023-02-15 01:01:46,837 INFO L226 Difference]: Without dead ends: 370 [2023-02-15 01:01:46,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:46,838 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 112 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:46,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 608 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-02-15 01:01:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 310. [2023-02-15 01:01:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 235 states have (on average 1.7617021276595746) internal successors, (414), 295 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 01:01:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 440 transitions. [2023-02-15 01:01:46,849 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 440 transitions. Word has length 13 [2023-02-15 01:01:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:46,849 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 440 transitions. [2023-02-15 01:01:46,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 440 transitions. [2023-02-15 01:01:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 01:01:46,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:46,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:46,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 01:01:46,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1917206946, now seen corresponding path program 1 times [2023-02-15 01:01:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:46,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767971356] [2023-02-15 01:01:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:46,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,950 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 01:01:46,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:46,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767971356] [2023-02-15 01:01:46,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767971356] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:46,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:46,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484848122] [2023-02-15 01:01:46,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:46,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:46,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:46,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:46,952 INFO L87 Difference]: Start difference. First operand 310 states and 440 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:47,150 INFO L93 Difference]: Finished difference Result 369 states and 470 transitions. [2023-02-15 01:01:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:01:47,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 01:01:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:47,151 INFO L225 Difference]: With dead ends: 369 [2023-02-15 01:01:47,152 INFO L226 Difference]: Without dead ends: 369 [2023-02-15 01:01:47,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:47,152 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 107 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:47,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 630 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-02-15 01:01:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 304. [2023-02-15 01:01:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 232 states have (on average 1.771551724137931) internal successors, (411), 289 states have internal predecessors, (411), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 431 transitions. [2023-02-15 01:01:47,161 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 431 transitions. Word has length 13 [2023-02-15 01:01:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:47,161 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 431 transitions. [2023-02-15 01:01:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 431 transitions. [2023-02-15 01:01:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 01:01:47,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:47,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:47,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 01:01:47,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 398929757, now seen corresponding path program 1 times [2023-02-15 01:01:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498434710] [2023-02-15 01:01:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:47,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,202 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 01:01:47,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:47,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498434710] [2023-02-15 01:01:47,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498434710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:47,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:47,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346233221] [2023-02-15 01:01:47,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:47,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:47,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:47,204 INFO L87 Difference]: Start difference. First operand 304 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:47,357 INFO L93 Difference]: Finished difference Result 473 states and 618 transitions. [2023-02-15 01:01:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 01:01:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:47,359 INFO L225 Difference]: With dead ends: 473 [2023-02-15 01:01:47,359 INFO L226 Difference]: Without dead ends: 473 [2023-02-15 01:01:47,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:47,360 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 247 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:47,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 342 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-15 01:01:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 310. [2023-02-15 01:01:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 238 states have (on average 1.7521008403361344) internal successors, (417), 295 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2023-02-15 01:01:47,366 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 15 [2023-02-15 01:01:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:47,366 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2023-02-15 01:01:47,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2023-02-15 01:01:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 01:01:47,367 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:47,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:47,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 01:01:47,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash 398929758, now seen corresponding path program 1 times [2023-02-15 01:01:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:47,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967262510] [2023-02-15 01:01:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,427 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 01:01:47,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:47,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967262510] [2023-02-15 01:01:47,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967262510] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:47,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:47,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:47,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332314193] [2023-02-15 01:01:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:47,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:47,429 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:47,542 INFO L93 Difference]: Finished difference Result 367 states and 461 transitions. [2023-02-15 01:01:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:47,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 01:01:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:47,544 INFO L225 Difference]: With dead ends: 367 [2023-02-15 01:01:47,544 INFO L226 Difference]: Without dead ends: 367 [2023-02-15 01:01:47,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:47,544 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 191 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:47,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 356 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-15 01:01:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 310. [2023-02-15 01:01:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 238 states have (on average 1.7142857142857142) internal successors, (408), 295 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 428 transitions. [2023-02-15 01:01:47,550 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 428 transitions. Word has length 15 [2023-02-15 01:01:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:47,550 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 428 transitions. [2023-02-15 01:01:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 428 transitions. [2023-02-15 01:01:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 01:01:47,551 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:47,551 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 01:01:47,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 01:01:47,551 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:47,551 INFO L85 PathProgramCache]: Analyzing trace with hash 688488293, now seen corresponding path program 1 times [2023-02-15 01:01:47,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:47,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931876453] [2023-02-15 01:01:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:47,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:47,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:47,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931876453] [2023-02-15 01:01:47,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931876453] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:47,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:47,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903990708] [2023-02-15 01:01:47,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:47,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:01:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:01:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:01:47,577 INFO L87 Difference]: Start difference. First operand 310 states and 428 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:47,648 INFO L93 Difference]: Finished difference Result 397 states and 521 transitions. [2023-02-15 01:01:47,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:01:47,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-15 01:01:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:47,650 INFO L225 Difference]: With dead ends: 397 [2023-02-15 01:01:47,650 INFO L226 Difference]: Without dead ends: 397 [2023-02-15 01:01:47,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:01:47,651 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 126 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:47,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 243 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-02-15 01:01:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 307. [2023-02-15 01:01:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 238 states have (on average 1.6890756302521008) internal successors, (402), 292 states have internal predecessors, (402), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 422 transitions. [2023-02-15 01:01:47,658 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 422 transitions. Word has length 19 [2023-02-15 01:01:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:47,658 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 422 transitions. [2023-02-15 01:01:47,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 422 transitions. [2023-02-15 01:01:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 01:01:47,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:47,659 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 01:01:47,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 01:01:47,660 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 688488294, now seen corresponding path program 1 times [2023-02-15 01:01:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964861392] [2023-02-15 01:01:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,710 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 01:01:47,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:47,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964861392] [2023-02-15 01:01:47,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964861392] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:47,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:47,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:47,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002888001] [2023-02-15 01:01:47,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:47,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:47,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:47,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:47,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:47,712 INFO L87 Difference]: Start difference. First operand 307 states and 422 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:47,838 INFO L93 Difference]: Finished difference Result 520 states and 644 transitions. [2023-02-15 01:01:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:47,839 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-15 01:01:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:47,840 INFO L225 Difference]: With dead ends: 520 [2023-02-15 01:01:47,840 INFO L226 Difference]: Without dead ends: 520 [2023-02-15 01:01:47,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:01:47,841 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 269 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:47,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 424 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-02-15 01:01:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 310. [2023-02-15 01:01:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 242 states have (on average 1.6694214876033058) internal successors, (404), 295 states have internal predecessors, (404), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 424 transitions. [2023-02-15 01:01:47,849 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 424 transitions. Word has length 19 [2023-02-15 01:01:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:47,849 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 424 transitions. [2023-02-15 01:01:47,849 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 424 transitions. [2023-02-15 01:01:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 01:01:47,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:47,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:47,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 01:01:47,850 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:47,851 INFO L85 PathProgramCache]: Analyzing trace with hash -131699369, now seen corresponding path program 1 times [2023-02-15 01:01:47,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:47,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286630189] [2023-02-15 01:01:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:47,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:47,902 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 01:01:47,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:47,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286630189] [2023-02-15 01:01:47,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286630189] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:47,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:47,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:47,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910523779] [2023-02-15 01:01:47,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:47,904 INFO L87 Difference]: Start difference. First operand 310 states and 424 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:48,043 INFO L93 Difference]: Finished difference Result 519 states and 642 transitions. [2023-02-15 01:01:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 01:01:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:48,045 INFO L225 Difference]: With dead ends: 519 [2023-02-15 01:01:48,045 INFO L226 Difference]: Without dead ends: 519 [2023-02-15 01:01:48,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:01:48,046 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 267 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:48,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 468 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-02-15 01:01:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 312. [2023-02-15 01:01:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 244 states have (on average 1.6639344262295082) internal successors, (406), 297 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 01:01:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 426 transitions. [2023-02-15 01:01:48,051 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 426 transitions. Word has length 20 [2023-02-15 01:01:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:48,051 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 426 transitions. [2023-02-15 01:01:48,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 426 transitions. [2023-02-15 01:01:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 01:01:48,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:48,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:48,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 01:01:48,053 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash -131643665, now seen corresponding path program 1 times [2023-02-15 01:01:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203666155] [2023-02-15 01:01:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,137 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 01:01:48,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:48,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203666155] [2023-02-15 01:01:48,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203666155] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:48,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:48,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:01:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412876695] [2023-02-15 01:01:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:48,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:48,140 INFO L87 Difference]: Start difference. First operand 312 states and 426 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:48,249 INFO L93 Difference]: Finished difference Result 528 states and 695 transitions. [2023-02-15 01:01:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:01:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 01:01:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:48,251 INFO L225 Difference]: With dead ends: 528 [2023-02-15 01:01:48,251 INFO L226 Difference]: Without dead ends: 528 [2023-02-15 01:01:48,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:01:48,252 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 325 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:48,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1068 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-02-15 01:01:48,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 340. [2023-02-15 01:01:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 267 states have (on average 1.6292134831460674) internal successors, (435), 321 states have internal predecessors, (435), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 465 transitions. [2023-02-15 01:01:48,258 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 465 transitions. Word has length 20 [2023-02-15 01:01:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:48,259 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 465 transitions. [2023-02-15 01:01:48,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 465 transitions. [2023-02-15 01:01:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 01:01:48,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:48,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:48,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 01:01:48,260 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash -131641743, now seen corresponding path program 1 times [2023-02-15 01:01:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523748104] [2023-02-15 01:01:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:48,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,388 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 01:01:48,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:48,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523748104] [2023-02-15 01:01:48,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523748104] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:48,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:48,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:01:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123915827] [2023-02-15 01:01:48,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:48,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:48,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:48,391 INFO L87 Difference]: Start difference. First operand 340 states and 465 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:48,490 INFO L93 Difference]: Finished difference Result 518 states and 681 transitions. [2023-02-15 01:01:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:01:48,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 01:01:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:48,492 INFO L225 Difference]: With dead ends: 518 [2023-02-15 01:01:48,492 INFO L226 Difference]: Without dead ends: 518 [2023-02-15 01:01:48,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:01:48,492 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 312 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:48,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1092 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-02-15 01:01:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 338. [2023-02-15 01:01:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 265 states have (on average 1.6264150943396227) internal successors, (431), 319 states have internal predecessors, (431), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 461 transitions. [2023-02-15 01:01:48,499 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 461 transitions. Word has length 20 [2023-02-15 01:01:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:48,500 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 461 transitions. [2023-02-15 01:01:48,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 461 transitions. [2023-02-15 01:01:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 01:01:48,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:48,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:48,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 01:01:48,501 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2560946, now seen corresponding path program 1 times [2023-02-15 01:01:48,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:48,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136189462] [2023-02-15 01:01:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:48,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,546 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 01:01:48,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:48,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136189462] [2023-02-15 01:01:48,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136189462] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:48,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:48,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:48,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884441989] [2023-02-15 01:01:48,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:48,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:48,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:48,548 INFO L87 Difference]: Start difference. First operand 338 states and 461 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:48,678 INFO L93 Difference]: Finished difference Result 560 states and 700 transitions. [2023-02-15 01:01:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 01:01:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:48,680 INFO L225 Difference]: With dead ends: 560 [2023-02-15 01:01:48,680 INFO L226 Difference]: Without dead ends: 560 [2023-02-15 01:01:48,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:01:48,681 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 270 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:48,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 448 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-02-15 01:01:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 342. [2023-02-15 01:01:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 269 states have (on average 1.6171003717472119) internal successors, (435), 323 states have internal predecessors, (435), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 465 transitions. [2023-02-15 01:01:48,687 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 465 transitions. Word has length 20 [2023-02-15 01:01:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:48,687 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 465 transitions. [2023-02-15 01:01:48,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 465 transitions. [2023-02-15 01:01:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 01:01:48,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:48,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:48,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 01:01:48,688 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2559024, now seen corresponding path program 1 times [2023-02-15 01:01:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053051665] [2023-02-15 01:01:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:48,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:48,775 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 01:01:48,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053051665] [2023-02-15 01:01:48,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053051665] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:48,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:48,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:01:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795613595] [2023-02-15 01:01:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:48,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:48,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:48,778 INFO L87 Difference]: Start difference. First operand 342 states and 465 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:48,898 INFO L93 Difference]: Finished difference Result 515 states and 675 transitions. [2023-02-15 01:01:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:01:48,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 01:01:48,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:48,900 INFO L225 Difference]: With dead ends: 515 [2023-02-15 01:01:48,900 INFO L226 Difference]: Without dead ends: 515 [2023-02-15 01:01:48,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:01:48,900 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 318 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:48,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1317 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-15 01:01:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 337. [2023-02-15 01:01:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 265 states have (on average 1.6113207547169812) internal successors, (427), 318 states have internal predecessors, (427), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 457 transitions. [2023-02-15 01:01:48,906 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 457 transitions. Word has length 20 [2023-02-15 01:01:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:48,906 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 457 transitions. [2023-02-15 01:01:48,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 457 transitions. [2023-02-15 01:01:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 01:01:48,907 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:48,907 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] [2023-02-15 01:01:48,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 01:01:48,908 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash 59872289, now seen corresponding path program 1 times [2023-02-15 01:01:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:48,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923329009] [2023-02-15 01:01:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:48,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:49,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:49,161 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 01:01:49,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923329009] [2023-02-15 01:01:49,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923329009] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:49,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:49,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 01:01:49,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606412996] [2023-02-15 01:01:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 01:01:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 01:01:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:49,162 INFO L87 Difference]: Start difference. First operand 337 states and 457 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:49,623 INFO L93 Difference]: Finished difference Result 629 states and 815 transitions. [2023-02-15 01:01:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 01:01:49,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-15 01:01:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:49,625 INFO L225 Difference]: With dead ends: 629 [2023-02-15 01:01:49,625 INFO L226 Difference]: Without dead ends: 627 [2023-02-15 01:01:49,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:01:49,626 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 421 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:49,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1122 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2023-02-15 01:01:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 331. [2023-02-15 01:01:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 259 states have (on average 1.606177606177606) internal successors, (416), 312 states have internal predecessors, (416), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2023-02-15 01:01:49,632 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 21 [2023-02-15 01:01:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:49,632 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2023-02-15 01:01:49,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2023-02-15 01:01:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 01:01:49,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:49,633 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] [2023-02-15 01:01:49,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 01:01:49,633 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -79389329, now seen corresponding path program 1 times [2023-02-15 01:01:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385730093] [2023-02-15 01:01:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:49,680 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 01:01:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385730093] [2023-02-15 01:01:49,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385730093] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:49,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:49,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:49,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804900983] [2023-02-15 01:01:49,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:49,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:49,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:49,682 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:49,802 INFO L93 Difference]: Finished difference Result 545 states and 675 transitions. [2023-02-15 01:01:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:49,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-15 01:01:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:49,804 INFO L225 Difference]: With dead ends: 545 [2023-02-15 01:01:49,804 INFO L226 Difference]: Without dead ends: 545 [2023-02-15 01:01:49,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:01:49,805 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 328 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:49,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 402 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-02-15 01:01:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 324. [2023-02-15 01:01:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 253 states have (on average 1.6126482213438735) internal successors, (408), 305 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 438 transitions. [2023-02-15 01:01:49,811 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 438 transitions. Word has length 21 [2023-02-15 01:01:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:49,811 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 438 transitions. [2023-02-15 01:01:49,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 438 transitions. [2023-02-15 01:01:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 01:01:49,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:49,812 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 01:01:49,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 01:01:49,812 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1710334668, now seen corresponding path program 1 times [2023-02-15 01:01:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:49,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824465951] [2023-02-15 01:01:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:49,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:49,858 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 01:01:49,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:49,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824465951] [2023-02-15 01:01:49,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824465951] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:49,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:49,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531447740] [2023-02-15 01:01:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:49,860 INFO L87 Difference]: Start difference. First operand 324 states and 438 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:49,999 INFO L93 Difference]: Finished difference Result 478 states and 615 transitions. [2023-02-15 01:01:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 01:01:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:50,001 INFO L225 Difference]: With dead ends: 478 [2023-02-15 01:01:50,001 INFO L226 Difference]: Without dead ends: 478 [2023-02-15 01:01:50,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:50,002 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 215 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:50,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 334 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-02-15 01:01:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 344. [2023-02-15 01:01:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.641025641025641) internal successors, (448), 325 states have internal predecessors, (448), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 478 transitions. [2023-02-15 01:01:50,007 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 478 transitions. Word has length 23 [2023-02-15 01:01:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:50,008 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 478 transitions. [2023-02-15 01:01:50,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 478 transitions. [2023-02-15 01:01:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 01:01:50,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:50,008 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 01:01:50,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 01:01:50,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:50,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1710334669, now seen corresponding path program 1 times [2023-02-15 01:01:50,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:50,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857579215] [2023-02-15 01:01:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:50,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:50,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:50,131 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 01:01:50,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857579215] [2023-02-15 01:01:50,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857579215] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:50,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:50,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:50,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252024437] [2023-02-15 01:01:50,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:50,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:50,133 INFO L87 Difference]: Start difference. First operand 344 states and 478 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:50,319 INFO L93 Difference]: Finished difference Result 403 states and 509 transitions. [2023-02-15 01:01:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:01:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 01:01:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:50,321 INFO L225 Difference]: With dead ends: 403 [2023-02-15 01:01:50,321 INFO L226 Difference]: Without dead ends: 403 [2023-02-15 01:01:50,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:50,321 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 352 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:50,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 415 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-02-15 01:01:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 344. [2023-02-15 01:01:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.6080586080586081) internal successors, (439), 325 states have internal predecessors, (439), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 469 transitions. [2023-02-15 01:01:50,326 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 469 transitions. Word has length 23 [2023-02-15 01:01:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:50,327 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 469 transitions. [2023-02-15 01:01:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 469 transitions. [2023-02-15 01:01:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 01:01:50,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:50,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 01:01:50,327 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2045900250, now seen corresponding path program 1 times [2023-02-15 01:01:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:50,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219556958] [2023-02-15 01:01:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:50,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:50,542 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 01:01:50,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:50,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219556958] [2023-02-15 01:01:50,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219556958] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:50,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:50,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 01:01:50,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283150293] [2023-02-15 01:01:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:01:50,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:01:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:01:50,544 INFO L87 Difference]: Start difference. First operand 344 states and 469 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:50,872 INFO L93 Difference]: Finished difference Result 763 states and 983 transitions. [2023-02-15 01:01:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 01:01:50,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-15 01:01:50,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:50,874 INFO L225 Difference]: With dead ends: 763 [2023-02-15 01:01:50,874 INFO L226 Difference]: Without dead ends: 763 [2023-02-15 01:01:50,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:01:50,875 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 370 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:50,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1297 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-02-15 01:01:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 376. [2023-02-15 01:01:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 305 states have (on average 1.5573770491803278) internal successors, (475), 355 states have internal predecessors, (475), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 505 transitions. [2023-02-15 01:01:50,881 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 505 transitions. Word has length 24 [2023-02-15 01:01:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:50,882 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 505 transitions. [2023-02-15 01:01:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 505 transitions. [2023-02-15 01:01:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 01:01:50,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:50,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 01:01:50,883 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1674205682, now seen corresponding path program 1 times [2023-02-15 01:01:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994403493] [2023-02-15 01:01:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:51,056 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 01:01:51,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994403493] [2023-02-15 01:01:51,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994403493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:51,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:51,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 01:01:51,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991803944] [2023-02-15 01:01:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:51,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:01:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:01:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:01:51,058 INFO L87 Difference]: Start difference. First operand 376 states and 505 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:51,311 INFO L93 Difference]: Finished difference Result 604 states and 769 transitions. [2023-02-15 01:01:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 01:01:51,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-15 01:01:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:51,313 INFO L225 Difference]: With dead ends: 604 [2023-02-15 01:01:51,313 INFO L226 Difference]: Without dead ends: 604 [2023-02-15 01:01:51,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-02-15 01:01:51,314 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 230 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:51,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1361 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2023-02-15 01:01:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 378. [2023-02-15 01:01:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 307 states have (on average 1.5537459283387622) internal successors, (477), 357 states have internal predecessors, (477), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 507 transitions. [2023-02-15 01:01:51,319 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 507 transitions. Word has length 25 [2023-02-15 01:01:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:51,320 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 507 transitions. [2023-02-15 01:01:51,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 507 transitions. [2023-02-15 01:01:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 01:01:51,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:51,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:51,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 01:01:51,320 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1383181005, now seen corresponding path program 1 times [2023-02-15 01:01:51,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:51,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771478642] [2023-02-15 01:01:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:51,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:51,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:51,388 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 01:01:51,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:51,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771478642] [2023-02-15 01:01:51,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771478642] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:51,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:51,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045986975] [2023-02-15 01:01:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:51,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:51,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:51,391 INFO L87 Difference]: Start difference. First operand 378 states and 507 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:51,648 INFO L93 Difference]: Finished difference Result 897 states and 1200 transitions. [2023-02-15 01:01:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:01:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-15 01:01:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:51,651 INFO L225 Difference]: With dead ends: 897 [2023-02-15 01:01:51,651 INFO L226 Difference]: Without dead ends: 897 [2023-02-15 01:01:51,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:01:51,651 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 428 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:51,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1159 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-02-15 01:01:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 473. [2023-02-15 01:01:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 402 states have (on average 1.5746268656716418) internal successors, (633), 447 states have internal predecessors, (633), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 20 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 663 transitions. [2023-02-15 01:01:51,659 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 663 transitions. Word has length 26 [2023-02-15 01:01:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:51,660 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 663 transitions. [2023-02-15 01:01:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 663 transitions. [2023-02-15 01:01:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 01:01:51,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:51,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:51,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 01:01:51,661 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 872646828, now seen corresponding path program 1 times [2023-02-15 01:01:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:51,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355267886] [2023-02-15 01:01:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:51,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:51,743 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 01:01:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:51,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355267886] [2023-02-15 01:01:51,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355267886] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:51,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:51,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095572360] [2023-02-15 01:01:51,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:51,745 INFO L87 Difference]: Start difference. First operand 473 states and 663 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:52,037 INFO L93 Difference]: Finished difference Result 894 states and 1190 transitions. [2023-02-15 01:01:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:01:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-15 01:01:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:52,040 INFO L225 Difference]: With dead ends: 894 [2023-02-15 01:01:52,040 INFO L226 Difference]: Without dead ends: 894 [2023-02-15 01:01:52,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:01:52,040 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 403 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:52,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1396 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-02-15 01:01:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 375. [2023-02-15 01:01:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 307 states have (on average 1.521172638436482) internal successors, (467), 354 states have internal predecessors, (467), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 01:01:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 497 transitions. [2023-02-15 01:01:52,051 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 497 transitions. Word has length 26 [2023-02-15 01:01:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:52,051 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 497 transitions. [2023-02-15 01:01:52,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 497 transitions. [2023-02-15 01:01:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 01:01:52,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:52,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:52,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 01:01:52,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -984725155, now seen corresponding path program 1 times [2023-02-15 01:01:52,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:52,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280962274] [2023-02-15 01:01:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:52,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:52,184 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 01:01:52,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:52,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280962274] [2023-02-15 01:01:52,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280962274] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:52,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:52,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798236474] [2023-02-15 01:01:52,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:52,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:52,188 INFO L87 Difference]: Start difference. First operand 375 states and 497 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:52,383 INFO L93 Difference]: Finished difference Result 487 states and 597 transitions. [2023-02-15 01:01:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:01:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-15 01:01:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:52,385 INFO L225 Difference]: With dead ends: 487 [2023-02-15 01:01:52,385 INFO L226 Difference]: Without dead ends: 487 [2023-02-15 01:01:52,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:52,386 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 676 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:52,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 335 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-15 01:01:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 386. [2023-02-15 01:01:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 323 states have (on average 1.501547987616099) internal successors, (485), 364 states have internal predecessors, (485), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-15 01:01:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 518 transitions. [2023-02-15 01:01:52,392 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 518 transitions. Word has length 26 [2023-02-15 01:01:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:52,392 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 518 transitions. [2023-02-15 01:01:52,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 518 transitions. [2023-02-15 01:01:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 01:01:52,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:52,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:52,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 01:01:52,393 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash -71084525, now seen corresponding path program 1 times [2023-02-15 01:01:52,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:52,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166044141] [2023-02-15 01:01:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:52,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:52,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:52,488 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 01:01:52,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166044141] [2023-02-15 01:01:52,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166044141] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:52,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:52,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:01:52,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817649858] [2023-02-15 01:01:52,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:52,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:01:52,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:52,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:01:52,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:52,490 INFO L87 Difference]: Start difference. First operand 386 states and 518 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:52,596 INFO L93 Difference]: Finished difference Result 436 states and 562 transitions. [2023-02-15 01:01:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:01:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-15 01:01:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:52,598 INFO L225 Difference]: With dead ends: 436 [2023-02-15 01:01:52,598 INFO L226 Difference]: Without dead ends: 436 [2023-02-15 01:01:52,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:52,598 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 137 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:52,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 486 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-02-15 01:01:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 386. [2023-02-15 01:01:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 323 states have (on average 1.498452012383901) internal successors, (484), 364 states have internal predecessors, (484), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-15 01:01:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 517 transitions. [2023-02-15 01:01:52,604 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 517 transitions. Word has length 27 [2023-02-15 01:01:52,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:52,604 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 517 transitions. [2023-02-15 01:01:52,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 517 transitions. [2023-02-15 01:01:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 01:01:52,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:52,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 01:01:52,605 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:52,606 INFO L85 PathProgramCache]: Analyzing trace with hash -461708714, now seen corresponding path program 1 times [2023-02-15 01:01:52,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:52,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453734101] [2023-02-15 01:01:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:52,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:52,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:52,690 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 01:01:52,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453734101] [2023-02-15 01:01:52,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453734101] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:52,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:52,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:52,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851737712] [2023-02-15 01:01:52,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:52,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:52,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:52,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:52,693 INFO L87 Difference]: Start difference. First operand 386 states and 517 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:52,844 INFO L93 Difference]: Finished difference Result 421 states and 528 transitions. [2023-02-15 01:01:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:01:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-15 01:01:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:52,847 INFO L225 Difference]: With dead ends: 421 [2023-02-15 01:01:52,847 INFO L226 Difference]: Without dead ends: 421 [2023-02-15 01:01:52,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:01:52,848 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 366 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:52,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 637 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-02-15 01:01:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 384. [2023-02-15 01:01:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 323 states have (on average 1.4860681114551084) internal successors, (480), 362 states have internal predecessors, (480), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-15 01:01:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 513 transitions. [2023-02-15 01:01:52,856 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 513 transitions. Word has length 27 [2023-02-15 01:01:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:52,856 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 513 transitions. [2023-02-15 01:01:52,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 513 transitions. [2023-02-15 01:01:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 01:01:52,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:52,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:52,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-15 01:01:52,858 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2092055213, now seen corresponding path program 1 times [2023-02-15 01:01:52,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:52,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283998247] [2023-02-15 01:01:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:52,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,075 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 01:01:53,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:53,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283998247] [2023-02-15 01:01:53,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283998247] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:53,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:53,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640645654] [2023-02-15 01:01:53,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:53,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:53,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:53,077 INFO L87 Difference]: Start difference. First operand 384 states and 513 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:53,245 INFO L93 Difference]: Finished difference Result 416 states and 534 transitions. [2023-02-15 01:01:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:01:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-15 01:01:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:53,246 INFO L225 Difference]: With dead ends: 416 [2023-02-15 01:01:53,246 INFO L226 Difference]: Without dead ends: 416 [2023-02-15 01:01:53,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:53,247 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 113 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:53,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 595 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-02-15 01:01:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 378. [2023-02-15 01:01:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 317 states have (on average 1.476340694006309) internal successors, (468), 356 states have internal predecessors, (468), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-15 01:01:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 501 transitions. [2023-02-15 01:01:53,253 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 501 transitions. Word has length 28 [2023-02-15 01:01:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:53,253 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 501 transitions. [2023-02-15 01:01:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 501 transitions. [2023-02-15 01:01:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 01:01:53,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:53,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 01:01:53,254 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2091347212, now seen corresponding path program 1 times [2023-02-15 01:01:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:53,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432886844] [2023-02-15 01:01:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,341 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 01:01:53,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:53,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432886844] [2023-02-15 01:01:53,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432886844] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:53,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:53,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:01:53,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740052126] [2023-02-15 01:01:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:53,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:01:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:01:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:53,343 INFO L87 Difference]: Start difference. First operand 378 states and 501 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:53,465 INFO L93 Difference]: Finished difference Result 497 states and 638 transitions. [2023-02-15 01:01:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:01:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-15 01:01:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:53,467 INFO L225 Difference]: With dead ends: 497 [2023-02-15 01:01:53,468 INFO L226 Difference]: Without dead ends: 497 [2023-02-15 01:01:53,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:53,468 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 164 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:53,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 461 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-02-15 01:01:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 416. [2023-02-15 01:01:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 351 states have (on average 1.4757834757834758) internal successors, (518), 392 states have internal predecessors, (518), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (26), 17 states have call predecessors, (26), 13 states have call successors, (26) [2023-02-15 01:01:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 557 transitions. [2023-02-15 01:01:53,480 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 557 transitions. Word has length 28 [2023-02-15 01:01:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:53,480 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 557 transitions. [2023-02-15 01:01:53,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 557 transitions. [2023-02-15 01:01:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 01:01:53,481 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:53,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:53,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 01:01:53,481 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1320441736, now seen corresponding path program 1 times [2023-02-15 01:01:53,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:53,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088700333] [2023-02-15 01:01:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:53,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,620 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 01:01:53,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088700333] [2023-02-15 01:01:53,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088700333] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:53,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:53,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:53,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505515773] [2023-02-15 01:01:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:53,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:53,622 INFO L87 Difference]: Start difference. First operand 416 states and 557 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:53,815 INFO L93 Difference]: Finished difference Result 518 states and 633 transitions. [2023-02-15 01:01:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:01:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-02-15 01:01:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:53,817 INFO L225 Difference]: With dead ends: 518 [2023-02-15 01:01:53,817 INFO L226 Difference]: Without dead ends: 518 [2023-02-15 01:01:53,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:01:53,817 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 857 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:53,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 259 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-02-15 01:01:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 419. [2023-02-15 01:01:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 355 states have (on average 1.4647887323943662) internal successors, (520), 393 states have internal predecessors, (520), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 19 states have call predecessors, (28), 14 states have call successors, (28) [2023-02-15 01:01:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 562 transitions. [2023-02-15 01:01:53,823 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 562 transitions. Word has length 29 [2023-02-15 01:01:53,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:53,823 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 562 transitions. [2023-02-15 01:01:53,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 562 transitions. [2023-02-15 01:01:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 01:01:53,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:53,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:53,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 01:01:53,824 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash -260017618, now seen corresponding path program 1 times [2023-02-15 01:01:53,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:53,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660387584] [2023-02-15 01:01:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:53,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:53,955 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 01:01:53,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:53,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660387584] [2023-02-15 01:01:53,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660387584] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:53,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:53,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:53,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106797001] [2023-02-15 01:01:53,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:53,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:53,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:53,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:53,958 INFO L87 Difference]: Start difference. First operand 419 states and 562 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:54,287 INFO L93 Difference]: Finished difference Result 746 states and 989 transitions. [2023-02-15 01:01:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:01:54,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-02-15 01:01:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:54,289 INFO L225 Difference]: With dead ends: 746 [2023-02-15 01:01:54,289 INFO L226 Difference]: Without dead ends: 746 [2023-02-15 01:01:54,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:01:54,290 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 339 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:54,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 691 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-02-15 01:01:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 459. [2023-02-15 01:01:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 391 states have (on average 1.4526854219948848) internal successors, (568), 431 states have internal predecessors, (568), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 20 states have call predecessors, (32), 16 states have call successors, (32) [2023-02-15 01:01:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 616 transitions. [2023-02-15 01:01:54,298 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 616 transitions. Word has length 30 [2023-02-15 01:01:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:54,298 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 616 transitions. [2023-02-15 01:01:54,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 616 transitions. [2023-02-15 01:01:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 01:01:54,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:54,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 01:01:54,299 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash 529388631, now seen corresponding path program 1 times [2023-02-15 01:01:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420283341] [2023-02-15 01:01:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:54,450 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 01:01:54,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:54,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420283341] [2023-02-15 01:01:54,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420283341] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:54,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:54,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:54,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690968105] [2023-02-15 01:01:54,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:54,452 INFO L87 Difference]: Start difference. First operand 459 states and 616 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:54,745 INFO L93 Difference]: Finished difference Result 520 states and 657 transitions. [2023-02-15 01:01:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 01:01:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-02-15 01:01:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:54,747 INFO L225 Difference]: With dead ends: 520 [2023-02-15 01:01:54,747 INFO L226 Difference]: Without dead ends: 520 [2023-02-15 01:01:54,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-02-15 01:01:54,748 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 422 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:54,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 498 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-02-15 01:01:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 459. [2023-02-15 01:01:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 391 states have (on average 1.4424552429667519) internal successors, (564), 431 states have internal predecessors, (564), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 20 states have call predecessors, (32), 16 states have call successors, (32) [2023-02-15 01:01:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 612 transitions. [2023-02-15 01:01:54,756 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 612 transitions. Word has length 31 [2023-02-15 01:01:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:54,757 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 612 transitions. [2023-02-15 01:01:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 612 transitions. [2023-02-15 01:01:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 01:01:54,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:54,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:54,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-15 01:01:54,759 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1684807341, now seen corresponding path program 1 times [2023-02-15 01:01:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:54,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590970053] [2023-02-15 01:01:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:55,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:55,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 01:01:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 01:01:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:55,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590970053] [2023-02-15 01:01:55,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590970053] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:01:55,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708609917] [2023-02-15 01:01:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:55,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:01:55,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:01:55,057 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 01:01:55,059 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 01:01:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 01:01:55,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:55,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:01:55,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:01:55,593 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 30 treesize of output 34 [2023-02-15 01:01:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 01:01:55,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708609917] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:01:55,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:01:55,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 26 [2023-02-15 01:01:55,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649967498] [2023-02-15 01:01:55,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:01:55,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 01:01:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:55,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 01:01:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-02-15 01:01:55,736 INFO L87 Difference]: Start difference. First operand 459 states and 612 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 01:01:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:56,403 INFO L93 Difference]: Finished difference Result 694 states and 875 transitions. [2023-02-15 01:01:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 01:01:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2023-02-15 01:01:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:56,405 INFO L225 Difference]: With dead ends: 694 [2023-02-15 01:01:56,405 INFO L226 Difference]: Without dead ends: 694 [2023-02-15 01:01:56,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 01:01:56,406 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1464 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:56,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 1449 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:01:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-02-15 01:01:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 454. [2023-02-15 01:01:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 387 states have (on average 1.426356589147287) internal successors, (552), 428 states have internal predecessors, (552), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2023-02-15 01:01:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 600 transitions. [2023-02-15 01:01:56,413 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 600 transitions. Word has length 40 [2023-02-15 01:01:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:56,414 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 600 transitions. [2023-02-15 01:01:56,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 01:01:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 600 transitions. [2023-02-15 01:01:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 01:01:56,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:56,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:56,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:56,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 01:01:56,623 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1517564365, now seen corresponding path program 1 times [2023-02-15 01:01:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:56,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718198461] [2023-02-15 01:01:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:56,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718198461] [2023-02-15 01:01:56,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718198461] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:56,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:56,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 01:01:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155805080] [2023-02-15 01:01:56,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:56,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:01:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:01:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:01:56,881 INFO L87 Difference]: Start difference. First operand 454 states and 600 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:57,342 INFO L93 Difference]: Finished difference Result 749 states and 926 transitions. [2023-02-15 01:01:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 01:01:57,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-02-15 01:01:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:57,344 INFO L225 Difference]: With dead ends: 749 [2023-02-15 01:01:57,344 INFO L226 Difference]: Without dead ends: 749 [2023-02-15 01:01:57,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2023-02-15 01:01:57,345 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 996 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:57,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 972 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-02-15 01:01:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 606. [2023-02-15 01:01:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 529 states have (on average 1.448015122873346) internal successors, (766), 575 states have internal predecessors, (766), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-02-15 01:01:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 832 transitions. [2023-02-15 01:01:57,364 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 832 transitions. Word has length 40 [2023-02-15 01:01:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:57,365 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 832 transitions. [2023-02-15 01:01:57,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 832 transitions. [2023-02-15 01:01:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 01:01:57,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:57,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-15 01:01:57,366 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1517564303, now seen corresponding path program 1 times [2023-02-15 01:01:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:57,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256409898] [2023-02-15 01:01:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:57,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:57,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256409898] [2023-02-15 01:01:57,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256409898] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:57,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:57,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205871380] [2023-02-15 01:01:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:57,494 INFO L87 Difference]: Start difference. First operand 606 states and 832 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:57,638 INFO L93 Difference]: Finished difference Result 685 states and 891 transitions. [2023-02-15 01:01:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:01:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-02-15 01:01:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:57,640 INFO L225 Difference]: With dead ends: 685 [2023-02-15 01:01:57,641 INFO L226 Difference]: Without dead ends: 685 [2023-02-15 01:01:57,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:01:57,641 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 356 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:57,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 482 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-02-15 01:01:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 602. [2023-02-15 01:01:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 525 states have (on average 1.4476190476190476) internal successors, (760), 571 states have internal predecessors, (760), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-02-15 01:01:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 826 transitions. [2023-02-15 01:01:57,651 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 826 transitions. Word has length 40 [2023-02-15 01:01:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:57,651 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 826 transitions. [2023-02-15 01:01:57,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 826 transitions. [2023-02-15 01:01:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 01:01:57,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:57,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:57,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-15 01:01:57,653 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash 767299090, now seen corresponding path program 1 times [2023-02-15 01:01:57,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:57,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913492390] [2023-02-15 01:01:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:57,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913492390] [2023-02-15 01:01:57,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913492390] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:57,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:57,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:01:57,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682604273] [2023-02-15 01:01:57,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:57,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:57,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:57,761 INFO L87 Difference]: Start difference. First operand 602 states and 826 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:57,839 INFO L93 Difference]: Finished difference Result 655 states and 846 transitions. [2023-02-15 01:01:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:01:57,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-02-15 01:01:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:57,849 INFO L225 Difference]: With dead ends: 655 [2023-02-15 01:01:57,849 INFO L226 Difference]: Without dead ends: 655 [2023-02-15 01:01:57,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:01:57,850 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 265 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:57,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 905 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-02-15 01:01:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 602. [2023-02-15 01:01:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 525 states have (on average 1.44) internal successors, (756), 571 states have internal predecessors, (756), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-02-15 01:01:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 822 transitions. [2023-02-15 01:01:57,861 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 822 transitions. Word has length 40 [2023-02-15 01:01:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:57,862 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 822 transitions. [2023-02-15 01:01:57,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 822 transitions. [2023-02-15 01:01:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 01:01:57,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:57,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:57,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-15 01:01:57,863 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1078522670, now seen corresponding path program 1 times [2023-02-15 01:01:57,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:57,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360354526] [2023-02-15 01:01:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 01:01:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 01:01:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:57,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360354526] [2023-02-15 01:01:57,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360354526] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:57,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:57,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804970385] [2023-02-15 01:01:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:57,986 INFO L87 Difference]: Start difference. First operand 602 states and 822 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:01:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:58,125 INFO L93 Difference]: Finished difference Result 729 states and 957 transitions. [2023-02-15 01:01:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:01:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-02-15 01:01:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:58,127 INFO L225 Difference]: With dead ends: 729 [2023-02-15 01:01:58,127 INFO L226 Difference]: Without dead ends: 729 [2023-02-15 01:01:58,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:58,128 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 321 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 326 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-02-15 01:01:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 600. [2023-02-15 01:01:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 525 states have (on average 1.417142857142857) internal successors, (744), 569 states have internal predecessors, (744), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2023-02-15 01:01:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 810 transitions. [2023-02-15 01:01:58,137 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 810 transitions. Word has length 42 [2023-02-15 01:01:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:58,138 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 810 transitions. [2023-02-15 01:01:58,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:01:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 810 transitions. [2023-02-15 01:01:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 01:01:58,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:58,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:58,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-15 01:01:58,139 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash -905379253, now seen corresponding path program 1 times [2023-02-15 01:01:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:58,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660318427] [2023-02-15 01:01:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:58,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:58,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:01:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:58,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660318427] [2023-02-15 01:01:58,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660318427] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:58,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:58,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:01:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518180260] [2023-02-15 01:01:58,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:01:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:01:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:01:58,261 INFO L87 Difference]: Start difference. First operand 600 states and 810 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:58,370 INFO L93 Difference]: Finished difference Result 682 states and 873 transitions. [2023-02-15 01:01:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:01:58,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-02-15 01:01:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:58,373 INFO L225 Difference]: With dead ends: 682 [2023-02-15 01:01:58,373 INFO L226 Difference]: Without dead ends: 682 [2023-02-15 01:01:58,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:01:58,373 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 317 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:58,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 429 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-02-15 01:01:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 445. [2023-02-15 01:01:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 381 states have (on average 1.3937007874015748) internal successors, (531), 419 states have internal predecessors, (531), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2023-02-15 01:01:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 579 transitions. [2023-02-15 01:01:58,380 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 579 transitions. Word has length 41 [2023-02-15 01:01:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:58,380 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 579 transitions. [2023-02-15 01:01:58,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:01:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 579 transitions. [2023-02-15 01:01:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 01:01:58,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:58,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:58,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-15 01:01:58,381 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash -940574757, now seen corresponding path program 1 times [2023-02-15 01:01:58,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:58,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635663592] [2023-02-15 01:01:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:58,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:01:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:58,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 01:01:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 01:01:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:01:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635663592] [2023-02-15 01:01:58,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635663592] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:01:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169810205] [2023-02-15 01:01:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:58,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:01:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:01:58,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:01:58,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 01:01:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 01:01:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:58,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:01:58,643 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 01:01:58,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 01:01:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 01:01:58,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169810205] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:01:58,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:01:58,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-02-15 01:01:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864282035] [2023-02-15 01:01:58,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:01:58,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:01:58,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:01:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:01:58,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:01:58,661 INFO L87 Difference]: Start difference. First operand 445 states and 579 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:59,122 INFO L93 Difference]: Finished difference Result 1350 states and 1684 transitions. [2023-02-15 01:01:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:01:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2023-02-15 01:01:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:59,126 INFO L225 Difference]: With dead ends: 1350 [2023-02-15 01:01:59,126 INFO L226 Difference]: Without dead ends: 1350 [2023-02-15 01:01:59,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-02-15 01:01:59,127 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 1684 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:59,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 901 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:01:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2023-02-15 01:01:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 547. [2023-02-15 01:01:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 475 states have (on average 1.3094736842105263) internal successors, (622), 510 states have internal predecessors, (622), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 26 states have call predecessors, (48), 24 states have call successors, (48) [2023-02-15 01:01:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 694 transitions. [2023-02-15 01:01:59,139 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 694 transitions. Word has length 43 [2023-02-15 01:01:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:59,140 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 694 transitions. [2023-02-15 01:01:59,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 694 transitions. [2023-02-15 01:01:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 01:01:59,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:59,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:59,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:59,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-15 01:01:59,346 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:01:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:59,346 INFO L85 PathProgramCache]: Analyzing trace with hash -934084823, now seen corresponding path program 1 times [2023-02-15 01:01:59,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:01:59,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285101130] [2023-02-15 01:01:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:59,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:01:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:00,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:00,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:00,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285101130] [2023-02-15 01:02:00,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285101130] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:00,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:00,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 01:02:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866585173] [2023-02-15 01:02:00,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:00,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:02:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:02:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:02:00,679 INFO L87 Difference]: Start difference. First operand 547 states and 694 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:01,474 INFO L93 Difference]: Finished difference Result 569 states and 716 transitions. [2023-02-15 01:02:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:02:01,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-02-15 01:02:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:01,476 INFO L225 Difference]: With dead ends: 569 [2023-02-15 01:02:01,476 INFO L226 Difference]: Without dead ends: 569 [2023-02-15 01:02:01,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:02:01,477 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 108 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:01,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 932 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:02:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-02-15 01:02:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 561. [2023-02-15 01:02:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 489 states have (on average 1.3047034764826175) internal successors, (638), 524 states have internal predecessors, (638), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 26 states have call predecessors, (48), 24 states have call successors, (48) [2023-02-15 01:02:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 710 transitions. [2023-02-15 01:02:01,484 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 710 transitions. Word has length 43 [2023-02-15 01:02:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:01,484 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 710 transitions. [2023-02-15 01:02:01,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 710 transitions. [2023-02-15 01:02:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:02:01,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:01,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:01,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-15 01:02:01,485 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1138243033, now seen corresponding path program 1 times [2023-02-15 01:02:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:01,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298120832] [2023-02-15 01:02:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:01,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:01,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:01,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298120832] [2023-02-15 01:02:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298120832] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:01,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:01,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 01:02:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138970923] [2023-02-15 01:02:01,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:01,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 01:02:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 01:02:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-15 01:02:01,790 INFO L87 Difference]: Start difference. First operand 561 states and 710 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:02,112 INFO L93 Difference]: Finished difference Result 899 states and 1131 transitions. [2023-02-15 01:02:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 01:02:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 01:02:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:02,115 INFO L225 Difference]: With dead ends: 899 [2023-02-15 01:02:02,116 INFO L226 Difference]: Without dead ends: 899 [2023-02-15 01:02:02,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:02:02,116 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 972 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:02,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1216 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:02:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-02-15 01:02:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 619. [2023-02-15 01:02:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 547 states have (on average 1.2888482632541134) internal successors, (705), 582 states have internal predecessors, (705), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 26 states have call predecessors, (48), 24 states have call successors, (48) [2023-02-15 01:02:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 777 transitions. [2023-02-15 01:02:02,126 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 777 transitions. Word has length 44 [2023-02-15 01:02:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:02,126 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 777 transitions. [2023-02-15 01:02:02,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 777 transitions. [2023-02-15 01:02:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:02:02,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:02,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:02,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-15 01:02:02,127 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1516678113, now seen corresponding path program 1 times [2023-02-15 01:02:02,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:02,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235091698] [2023-02-15 01:02:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:02,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:03,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:03,363 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 01:02:03,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:03,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235091698] [2023-02-15 01:02:03,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235091698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:03,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108152620] [2023-02-15 01:02:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:03,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:03,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:03,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:03,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 01:02:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:03,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 01:02:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:03,606 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 01:02:03,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:04,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:04,003 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 29 treesize of output 28 [2023-02-15 01:02:04,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:04,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 01:02:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:04,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:04,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108152620] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:04,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:04,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [20] total 32 [2023-02-15 01:02:04,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805335567] [2023-02-15 01:02:04,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:04,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 01:02:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 01:02:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 01:02:04,181 INFO L87 Difference]: Start difference. First operand 619 states and 777 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:05,175 INFO L93 Difference]: Finished difference Result 930 states and 1138 transitions. [2023-02-15 01:02:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 01:02:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 01:02:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:05,178 INFO L225 Difference]: With dead ends: 930 [2023-02-15 01:02:05,178 INFO L226 Difference]: Without dead ends: 930 [2023-02-15 01:02:05,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=402, Invalid=2250, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 01:02:05,179 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1016 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:05,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 1222 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:02:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2023-02-15 01:02:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 712. [2023-02-15 01:02:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 629 states have (on average 1.2893481717011128) internal successors, (811), 669 states have internal predecessors, (811), 30 states have call successors, (30), 13 states have call predecessors, (30), 26 states have return successors, (60), 29 states have call predecessors, (60), 30 states have call successors, (60) [2023-02-15 01:02:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 901 transitions. [2023-02-15 01:02:05,191 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 901 transitions. Word has length 44 [2023-02-15 01:02:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:05,191 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 901 transitions. [2023-02-15 01:02:05,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 901 transitions. [2023-02-15 01:02:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:02:05,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:05,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:05,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:05,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:05,401 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:05,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1516678114, now seen corresponding path program 1 times [2023-02-15 01:02:05,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:05,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950850716] [2023-02-15 01:02:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:05,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:07,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:07,109 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 01:02:07,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:07,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950850716] [2023-02-15 01:02:07,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950850716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998192666] [2023-02-15 01:02:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:07,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:07,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:07,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:07,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 01:02:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 01:02:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:07,360 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 01:02:07,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:07,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:07,711 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 27 treesize of output 26 [2023-02-15 01:02:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:07,717 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 29 treesize of output 28 [2023-02-15 01:02:07,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 01:02:07,852 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 19 treesize of output 7 [2023-02-15 01:02:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:07,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:07,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998192666] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:07,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:07,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [20] total 33 [2023-02-15 01:02:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879091454] [2023-02-15 01:02:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:07,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:02:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:02:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 01:02:07,915 INFO L87 Difference]: Start difference. First operand 712 states and 901 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:08,762 INFO L93 Difference]: Finished difference Result 1016 states and 1248 transitions. [2023-02-15 01:02:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 01:02:08,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 01:02:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:08,765 INFO L225 Difference]: With dead ends: 1016 [2023-02-15 01:02:08,765 INFO L226 Difference]: Without dead ends: 1016 [2023-02-15 01:02:08,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=306, Invalid=1950, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 01:02:08,766 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 1311 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:08,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 986 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:02:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2023-02-15 01:02:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 786. [2023-02-15 01:02:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 695 states have (on average 1.3050359712230215) internal successors, (907), 739 states have internal predecessors, (907), 34 states have call successors, (34), 15 states have call predecessors, (34), 30 states have return successors, (68), 31 states have call predecessors, (68), 34 states have call successors, (68) [2023-02-15 01:02:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1009 transitions. [2023-02-15 01:02:08,778 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1009 transitions. Word has length 44 [2023-02-15 01:02:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:08,778 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1009 transitions. [2023-02-15 01:02:08,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1009 transitions. [2023-02-15 01:02:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:02:08,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:08,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:08,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:08,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:08,985 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:08,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1518525155, now seen corresponding path program 1 times [2023-02-15 01:02:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:08,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412975298] [2023-02-15 01:02:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:08,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:09,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:09,702 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 01:02:09,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:09,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412975298] [2023-02-15 01:02:09,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412975298] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:09,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312026347] [2023-02-15 01:02:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:09,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:09,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:09,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 01:02:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 01:02:09,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:09,865 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 01:02:10,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:10,303 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:10,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-15 01:02:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:10,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:10,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312026347] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:10,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:10,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 27 [2023-02-15 01:02:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870489951] [2023-02-15 01:02:10,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 01:02:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 01:02:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-02-15 01:02:10,324 INFO L87 Difference]: Start difference. First operand 786 states and 1009 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:11,101 INFO L93 Difference]: Finished difference Result 1175 states and 1462 transitions. [2023-02-15 01:02:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 01:02:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 01:02:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:11,111 INFO L225 Difference]: With dead ends: 1175 [2023-02-15 01:02:11,112 INFO L226 Difference]: Without dead ends: 1175 [2023-02-15 01:02:11,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 01:02:11,113 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 874 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:11,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 1005 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:02:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2023-02-15 01:02:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 944. [2023-02-15 01:02:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 829 states have (on average 1.3063932448733413) internal successors, (1083), 885 states have internal predecessors, (1083), 46 states have call successors, (46), 21 states have call predecessors, (46), 42 states have return successors, (92), 37 states have call predecessors, (92), 46 states have call successors, (92) [2023-02-15 01:02:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1221 transitions. [2023-02-15 01:02:11,140 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1221 transitions. Word has length 44 [2023-02-15 01:02:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:11,141 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1221 transitions. [2023-02-15 01:02:11,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1221 transitions. [2023-02-15 01:02:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:02:11,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:11,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:11,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:11,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-15 01:02:11,349 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1518525156, now seen corresponding path program 1 times [2023-02-15 01:02:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:11,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947360555] [2023-02-15 01:02:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:12,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:12,426 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 01:02:12,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947360555] [2023-02-15 01:02:12,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947360555] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109670370] [2023-02-15 01:02:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:12,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:12,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:12,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:12,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 01:02:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 01:02:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:12,607 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 01:02:12,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:12,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:13,105 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:13,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-02-15 01:02:13,108 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:13,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-15 01:02:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:13,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:13,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109670370] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:13,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:13,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20] total 31 [2023-02-15 01:02:13,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712461614] [2023-02-15 01:02:13,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:13,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 01:02:13,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 01:02:13,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2023-02-15 01:02:13,167 INFO L87 Difference]: Start difference. First operand 944 states and 1221 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:13,882 INFO L93 Difference]: Finished difference Result 1262 states and 1589 transitions. [2023-02-15 01:02:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 01:02:13,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 01:02:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:13,888 INFO L225 Difference]: With dead ends: 1262 [2023-02-15 01:02:13,889 INFO L226 Difference]: Without dead ends: 1262 [2023-02-15 01:02:13,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 01:02:13,891 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1050 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:13,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 1029 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:02:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2023-02-15 01:02:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1074. [2023-02-15 01:02:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 943 states have (on average 1.3266171792152703) internal successors, (1251), 1007 states have internal predecessors, (1251), 54 states have call successors, (54), 25 states have call predecessors, (54), 50 states have return successors, (108), 41 states have call predecessors, (108), 54 states have call successors, (108) [2023-02-15 01:02:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1413 transitions. [2023-02-15 01:02:13,911 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1413 transitions. Word has length 44 [2023-02-15 01:02:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:13,911 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1413 transitions. [2023-02-15 01:02:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1413 transitions. [2023-02-15 01:02:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:13,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:13,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:13,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 01:02:14,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-15 01:02:14,120 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1948359968, now seen corresponding path program 1 times [2023-02-15 01:02:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:14,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881932930] [2023-02-15 01:02:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:14,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:02:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:14,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881932930] [2023-02-15 01:02:14,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881932930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:14,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164786907] [2023-02-15 01:02:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:14,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:14,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:14,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 01:02:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 01:02:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:14,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 01:02:14,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 01:02:14,507 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:14,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-15 01:02:14,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:14,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-15 01:02:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:14,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:02:14,587 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 46 treesize of output 38 [2023-02-15 01:02:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:14,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164786907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:02:14,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:02:14,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 18 [2023-02-15 01:02:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691871168] [2023-02-15 01:02:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:02:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 01:02:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:14,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 01:02:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-02-15 01:02:14,708 INFO L87 Difference]: Start difference. First operand 1074 states and 1413 transitions. Second operand has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:02:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:15,305 INFO L93 Difference]: Finished difference Result 1573 states and 2079 transitions. [2023-02-15 01:02:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 01:02:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-02-15 01:02:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:15,314 INFO L225 Difference]: With dead ends: 1573 [2023-02-15 01:02:15,314 INFO L226 Difference]: Without dead ends: 1573 [2023-02-15 01:02:15,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-02-15 01:02:15,316 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 811 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:15,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 2141 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:02:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2023-02-15 01:02:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 817. [2023-02-15 01:02:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 708 states have (on average 1.3276836158192091) internal successors, (940), 765 states have internal predecessors, (940), 42 states have call successors, (42), 20 states have call predecessors, (42), 40 states have return successors, (84), 31 states have call predecessors, (84), 42 states have call successors, (84) [2023-02-15 01:02:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1066 transitions. [2023-02-15 01:02:15,330 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1066 transitions. Word has length 45 [2023-02-15 01:02:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:15,330 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1066 transitions. [2023-02-15 01:02:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:02:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1066 transitions. [2023-02-15 01:02:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:15,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:15,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:15,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:15,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:15,535 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash -227620062, now seen corresponding path program 1 times [2023-02-15 01:02:15,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:15,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241932348] [2023-02-15 01:02:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:17,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:17,217 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 01:02:17,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241932348] [2023-02-15 01:02:17,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241932348] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:17,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415663012] [2023-02-15 01:02:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:17,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:17,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:17,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:17,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 01:02:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 01:02:17,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:17,532 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 41 treesize of output 40 [2023-02-15 01:02:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:17,535 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 41 treesize of output 40 [2023-02-15 01:02:17,644 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 19 [2023-02-15 01:02:17,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 01:02:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:17,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:17,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415663012] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:17,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:17,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [22] total 30 [2023-02-15 01:02:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657340736] [2023-02-15 01:02:17,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:17,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 01:02:17,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 01:02:17,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-02-15 01:02:17,688 INFO L87 Difference]: Start difference. First operand 817 states and 1066 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:18,072 INFO L93 Difference]: Finished difference Result 1149 states and 1457 transitions. [2023-02-15 01:02:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 01:02:18,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 01:02:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:18,089 INFO L225 Difference]: With dead ends: 1149 [2023-02-15 01:02:18,089 INFO L226 Difference]: Without dead ends: 1149 [2023-02-15 01:02:18,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 01:02:18,090 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 402 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:18,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 974 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:02:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2023-02-15 01:02:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 989. [2023-02-15 01:02:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 858 states have (on average 1.32983682983683) internal successors, (1141), 926 states have internal predecessors, (1141), 54 states have call successors, (54), 25 states have call predecessors, (54), 50 states have return successors, (108), 37 states have call predecessors, (108), 54 states have call successors, (108) [2023-02-15 01:02:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1303 transitions. [2023-02-15 01:02:18,103 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1303 transitions. Word has length 45 [2023-02-15 01:02:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:18,104 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1303 transitions. [2023-02-15 01:02:18,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1303 transitions. [2023-02-15 01:02:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:18,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:18,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:18,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:18,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 01:02:18,309 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash -170361760, now seen corresponding path program 1 times [2023-02-15 01:02:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:18,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411144335] [2023-02-15 01:02:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:18,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:18,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:18,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411144335] [2023-02-15 01:02:18,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411144335] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:18,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:18,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-15 01:02:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515220485] [2023-02-15 01:02:18,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:18,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:02:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:02:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:02:18,595 INFO L87 Difference]: Start difference. First operand 989 states and 1303 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:18,955 INFO L93 Difference]: Finished difference Result 1166 states and 1473 transitions. [2023-02-15 01:02:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 01:02:18,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 01:02:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:18,958 INFO L225 Difference]: With dead ends: 1166 [2023-02-15 01:02:18,958 INFO L226 Difference]: Without dead ends: 1166 [2023-02-15 01:02:18,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2023-02-15 01:02:18,959 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 870 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:18,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1025 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:02:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2023-02-15 01:02:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 983. [2023-02-15 01:02:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 852 states have (on average 1.3286384976525822) internal successors, (1132), 920 states have internal predecessors, (1132), 54 states have call successors, (54), 25 states have call predecessors, (54), 50 states have return successors, (108), 37 states have call predecessors, (108), 54 states have call successors, (108) [2023-02-15 01:02:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1294 transitions. [2023-02-15 01:02:18,972 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1294 transitions. Word has length 45 [2023-02-15 01:02:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:18,973 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1294 transitions. [2023-02-15 01:02:18,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1294 transitions. [2023-02-15 01:02:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:18,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:18,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:18,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-15 01:02:18,974 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1074946575, now seen corresponding path program 1 times [2023-02-15 01:02:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569658072] [2023-02-15 01:02:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:19,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:19,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569658072] [2023-02-15 01:02:19,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569658072] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:19,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:19,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 01:02:19,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537723478] [2023-02-15 01:02:19,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 01:02:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 01:02:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-15 01:02:19,275 INFO L87 Difference]: Start difference. First operand 983 states and 1294 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:20,155 INFO L93 Difference]: Finished difference Result 1203 states and 1513 transitions. [2023-02-15 01:02:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 01:02:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 01:02:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:20,157 INFO L225 Difference]: With dead ends: 1203 [2023-02-15 01:02:20,158 INFO L226 Difference]: Without dead ends: 1203 [2023-02-15 01:02:20,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2023-02-15 01:02:20,158 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 804 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:20,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 1317 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:02:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2023-02-15 01:02:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 993. [2023-02-15 01:02:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 860 states have (on average 1.3290697674418606) internal successors, (1143), 929 states have internal predecessors, (1143), 54 states have call successors, (54), 26 states have call predecessors, (54), 52 states have return successors, (108), 37 states have call predecessors, (108), 54 states have call successors, (108) [2023-02-15 01:02:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1305 transitions. [2023-02-15 01:02:20,171 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1305 transitions. Word has length 45 [2023-02-15 01:02:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:20,171 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1305 transitions. [2023-02-15 01:02:20,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1305 transitions. [2023-02-15 01:02:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:20,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:20,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-15 01:02:20,172 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1074946574, now seen corresponding path program 1 times [2023-02-15 01:02:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:20,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888149818] [2023-02-15 01:02:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:20,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:20,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888149818] [2023-02-15 01:02:20,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888149818] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:20,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:20,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 01:02:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443395935] [2023-02-15 01:02:20,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 01:02:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 01:02:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-15 01:02:20,620 INFO L87 Difference]: Start difference. First operand 993 states and 1305 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:21,500 INFO L93 Difference]: Finished difference Result 1200 states and 1518 transitions. [2023-02-15 01:02:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 01:02:21,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 01:02:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:21,502 INFO L225 Difference]: With dead ends: 1200 [2023-02-15 01:02:21,502 INFO L226 Difference]: Without dead ends: 1200 [2023-02-15 01:02:21,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:02:21,503 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 750 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:21,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1187 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:02:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2023-02-15 01:02:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1024. [2023-02-15 01:02:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 887 states have (on average 1.3314543404735062) internal successors, (1181), 958 states have internal predecessors, (1181), 56 states have call successors, (56), 27 states have call predecessors, (56), 54 states have return successors, (112), 38 states have call predecessors, (112), 56 states have call successors, (112) [2023-02-15 01:02:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1349 transitions. [2023-02-15 01:02:21,520 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1349 transitions. Word has length 45 [2023-02-15 01:02:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:21,521 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1349 transitions. [2023-02-15 01:02:21,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1349 transitions. [2023-02-15 01:02:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:21,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:21,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:21,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-02-15 01:02:21,522 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1073099533, now seen corresponding path program 1 times [2023-02-15 01:02:21,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:21,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490807057] [2023-02-15 01:02:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:22,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:22,121 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 01:02:22,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490807057] [2023-02-15 01:02:22,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490807057] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571640248] [2023-02-15 01:02:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:22,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:22,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:22,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 01:02:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 01:02:22,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:22,336 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 01:02:22,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:22,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:22,574 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 29 treesize of output 28 [2023-02-15 01:02:22,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 01:02:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:22,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:22,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571640248] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:22,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:22,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2023-02-15 01:02:22,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173963723] [2023-02-15 01:02:22,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:22,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:02:22,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:02:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-02-15 01:02:22,671 INFO L87 Difference]: Start difference. First operand 1024 states and 1349 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:23,458 INFO L93 Difference]: Finished difference Result 1287 states and 1653 transitions. [2023-02-15 01:02:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 01:02:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 01:02:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:23,460 INFO L225 Difference]: With dead ends: 1287 [2023-02-15 01:02:23,460 INFO L226 Difference]: Without dead ends: 1287 [2023-02-15 01:02:23,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=1576, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 01:02:23,461 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 758 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:23,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 1381 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:02:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2023-02-15 01:02:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1034. [2023-02-15 01:02:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 895 states have (on average 1.3318435754189943) internal successors, (1192), 967 states have internal predecessors, (1192), 56 states have call successors, (56), 28 states have call predecessors, (56), 56 states have return successors, (112), 38 states have call predecessors, (112), 56 states have call successors, (112) [2023-02-15 01:02:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1360 transitions. [2023-02-15 01:02:23,476 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1360 transitions. Word has length 45 [2023-02-15 01:02:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:23,477 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1360 transitions. [2023-02-15 01:02:23,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1360 transitions. [2023-02-15 01:02:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:23,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:23,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:23,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:23,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:23,683 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1073099532, now seen corresponding path program 1 times [2023-02-15 01:02:23,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:23,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850225337] [2023-02-15 01:02:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:23,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:24,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:24,540 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 01:02:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:24,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850225337] [2023-02-15 01:02:24,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850225337] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:24,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076424935] [2023-02-15 01:02:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:24,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:24,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:24,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:24,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 01:02:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:24,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 01:02:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:24,758 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 01:02:24,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:24,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:25,083 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 29 treesize of output 28 [2023-02-15 01:02:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:25,087 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 27 treesize of output 26 [2023-02-15 01:02:25,274 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:25,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2023-02-15 01:02:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:25,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2023-02-15 01:02:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:25,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:25,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076424935] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:25,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:25,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [18] total 32 [2023-02-15 01:02:25,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510371275] [2023-02-15 01:02:25,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:25,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 01:02:25,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 01:02:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 01:02:25,333 INFO L87 Difference]: Start difference. First operand 1034 states and 1360 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:26,501 INFO L93 Difference]: Finished difference Result 1300 states and 1661 transitions. [2023-02-15 01:02:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 01:02:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 01:02:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:26,504 INFO L225 Difference]: With dead ends: 1300 [2023-02-15 01:02:26,504 INFO L226 Difference]: Without dead ends: 1300 [2023-02-15 01:02:26,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 01:02:26,504 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 957 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:26,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 1790 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 01:02:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2023-02-15 01:02:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1030. [2023-02-15 01:02:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 891 states have (on average 1.3310886644219977) internal successors, (1186), 963 states have internal predecessors, (1186), 56 states have call successors, (56), 28 states have call predecessors, (56), 56 states have return successors, (112), 38 states have call predecessors, (112), 56 states have call successors, (112) [2023-02-15 01:02:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1354 transitions. [2023-02-15 01:02:26,518 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1354 transitions. Word has length 45 [2023-02-15 01:02:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:26,518 INFO L495 AbstractCegarLoop]: Abstraction has 1030 states and 1354 transitions. [2023-02-15 01:02:26,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1354 transitions. [2023-02-15 01:02:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:02:26,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:26,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:26,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-15 01:02:26,724 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash -696511495, now seen corresponding path program 1 times [2023-02-15 01:02:26,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:26,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159242877] [2023-02-15 01:02:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159242877] [2023-02-15 01:02:27,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159242877] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:27,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:27,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-15 01:02:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717993432] [2023-02-15 01:02:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:27,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:02:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:02:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:02:27,155 INFO L87 Difference]: Start difference. First operand 1030 states and 1354 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:27,513 INFO L93 Difference]: Finished difference Result 1061 states and 1354 transitions. [2023-02-15 01:02:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:02:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 01:02:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:27,516 INFO L225 Difference]: With dead ends: 1061 [2023-02-15 01:02:27,516 INFO L226 Difference]: Without dead ends: 1059 [2023-02-15 01:02:27,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2023-02-15 01:02:27,516 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 899 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:27,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 1212 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:02:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2023-02-15 01:02:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 862. [2023-02-15 01:02:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 747 states have (on average 1.323962516733601) internal successors, (989), 807 states have internal predecessors, (989), 44 states have call successors, (44), 22 states have call predecessors, (44), 44 states have return successors, (88), 32 states have call predecessors, (88), 44 states have call successors, (88) [2023-02-15 01:02:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1121 transitions. [2023-02-15 01:02:27,525 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1121 transitions. Word has length 45 [2023-02-15 01:02:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:27,526 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1121 transitions. [2023-02-15 01:02:27,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1121 transitions. [2023-02-15 01:02:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 01:02:27,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:27,527 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, 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 01:02:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-15 01:02:27,527 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash 139090909, now seen corresponding path program 1 times [2023-02-15 01:02:27,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:27,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825236639] [2023-02-15 01:02:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:02:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:27,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:27,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825236639] [2023-02-15 01:02:27,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825236639] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:27,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284540191] [2023-02-15 01:02:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:27,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:27,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:27,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:27,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 01:02:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 01:02:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:27,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 01:02:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:02:27,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:27,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284540191] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:27,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:27,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-15 01:02:27,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592270394] [2023-02-15 01:02:27,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:27,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:02:27,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:27,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:02:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:02:27,980 INFO L87 Difference]: Start difference. First operand 862 states and 1121 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:28,208 INFO L93 Difference]: Finished difference Result 680 states and 868 transitions. [2023-02-15 01:02:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:02:28,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-02-15 01:02:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:28,210 INFO L225 Difference]: With dead ends: 680 [2023-02-15 01:02:28,210 INFO L226 Difference]: Without dead ends: 680 [2023-02-15 01:02:28,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-15 01:02:28,210 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 81 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:28,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 689 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:02:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-02-15 01:02:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 654. [2023-02-15 01:02:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 563 states have (on average 1.3143872113676731) internal successors, (740), 611 states have internal predecessors, (740), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 26 states have call predecessors, (64), 32 states have call successors, (64) [2023-02-15 01:02:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 836 transitions. [2023-02-15 01:02:28,218 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 836 transitions. Word has length 46 [2023-02-15 01:02:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:28,218 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 836 transitions. [2023-02-15 01:02:28,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 836 transitions. [2023-02-15 01:02:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 01:02:28,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:28,219 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:28,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:28,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-15 01:02:28,422 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1036393234, now seen corresponding path program 1 times [2023-02-15 01:02:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:28,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463243694] [2023-02-15 01:02:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:28,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:28,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:28,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:28,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463243694] [2023-02-15 01:02:28,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463243694] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:28,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-15 01:02:28,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492453172] [2023-02-15 01:02:28,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:28,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 01:02:28,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 01:02:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-15 01:02:28,761 INFO L87 Difference]: Start difference. First operand 654 states and 836 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:29,315 INFO L93 Difference]: Finished difference Result 776 states and 961 transitions. [2023-02-15 01:02:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 01:02:29,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-02-15 01:02:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:29,317 INFO L225 Difference]: With dead ends: 776 [2023-02-15 01:02:29,317 INFO L226 Difference]: Without dead ends: 776 [2023-02-15 01:02:29,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:02:29,318 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 739 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:29,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 882 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:02:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-02-15 01:02:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 654. [2023-02-15 01:02:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 563 states have (on average 1.3143872113676731) internal successors, (740), 611 states have internal predecessors, (740), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 26 states have call predecessors, (64), 32 states have call successors, (64) [2023-02-15 01:02:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 836 transitions. [2023-02-15 01:02:29,327 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 836 transitions. Word has length 46 [2023-02-15 01:02:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:29,327 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 836 transitions. [2023-02-15 01:02:29,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 836 transitions. [2023-02-15 01:02:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 01:02:29,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:29,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:29,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-02-15 01:02:29,329 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1093651536, now seen corresponding path program 1 times [2023-02-15 01:02:29,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:29,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741537398] [2023-02-15 01:02:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:29,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:29,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:29,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741537398] [2023-02-15 01:02:29,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741537398] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:29,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:29,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 01:02:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651990524] [2023-02-15 01:02:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:29,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 01:02:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 01:02:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-02-15 01:02:29,748 INFO L87 Difference]: Start difference. First operand 654 states and 836 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:30,687 INFO L93 Difference]: Finished difference Result 992 states and 1207 transitions. [2023-02-15 01:02:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 01:02:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-02-15 01:02:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:30,691 INFO L225 Difference]: With dead ends: 992 [2023-02-15 01:02:30,691 INFO L226 Difference]: Without dead ends: 992 [2023-02-15 01:02:30,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 01:02:30,692 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 789 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:30,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1746 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:02:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2023-02-15 01:02:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 567. [2023-02-15 01:02:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 488 states have (on average 1.3073770491803278) internal successors, (638), 530 states have internal predecessors, (638), 26 states have call successors, (26), 13 states have call predecessors, (26), 26 states have return successors, (52), 23 states have call predecessors, (52), 26 states have call successors, (52) [2023-02-15 01:02:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 716 transitions. [2023-02-15 01:02:30,698 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 716 transitions. Word has length 46 [2023-02-15 01:02:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:30,699 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 716 transitions. [2023-02-15 01:02:30,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 716 transitions. [2023-02-15 01:02:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 01:02:30,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:30,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:30,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-02-15 01:02:30,700 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 301908134, now seen corresponding path program 1 times [2023-02-15 01:02:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721824258] [2023-02-15 01:02:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:31,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:31,817 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 01:02:31,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:31,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721824258] [2023-02-15 01:02:31,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721824258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:31,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526387924] [2023-02-15 01:02:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:31,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:31,819 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:31,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 01:02:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 01:02:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:32,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:32,264 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 29 treesize of output 28 [2023-02-15 01:02:32,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 01:02:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:32,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526387924] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:32,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:32,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 29 [2023-02-15 01:02:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504632222] [2023-02-15 01:02:32,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:32,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:02:32,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:02:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-02-15 01:02:32,353 INFO L87 Difference]: Start difference. First operand 567 states and 716 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:33,068 INFO L93 Difference]: Finished difference Result 913 states and 1128 transitions. [2023-02-15 01:02:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 01:02:33,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-02-15 01:02:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:33,070 INFO L225 Difference]: With dead ends: 913 [2023-02-15 01:02:33,070 INFO L226 Difference]: Without dead ends: 913 [2023-02-15 01:02:33,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=376, Invalid=1976, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 01:02:33,071 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1288 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:33,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 986 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:02:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-02-15 01:02:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 659. [2023-02-15 01:02:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 568 states have (on average 1.3098591549295775) internal successors, (744), 616 states have internal predecessors, (744), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 26 states have call predecessors, (64), 32 states have call successors, (64) [2023-02-15 01:02:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 840 transitions. [2023-02-15 01:02:33,080 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 840 transitions. Word has length 47 [2023-02-15 01:02:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:33,081 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 840 transitions. [2023-02-15 01:02:33,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 840 transitions. [2023-02-15 01:02:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 01:02:33,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:33,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:33,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 01:02:33,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-15 01:02:33,287 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -507438492, now seen corresponding path program 1 times [2023-02-15 01:02:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:33,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000529934] [2023-02-15 01:02:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:33,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:33,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:33,893 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 01:02:33,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:33,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000529934] [2023-02-15 01:02:33,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000529934] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:33,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464932322] [2023-02-15 01:02:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:33,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:33,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:33,895 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:33,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 01:02:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 01:02:34,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:34,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:02:34,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:34,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-15 01:02:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:34,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:02:34,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464932322] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:34,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:02:34,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [19] total 29 [2023-02-15 01:02:34,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765293065] [2023-02-15 01:02:34,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 01:02:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 01:02:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-02-15 01:02:34,453 INFO L87 Difference]: Start difference. First operand 659 states and 840 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:35,005 INFO L93 Difference]: Finished difference Result 780 states and 962 transitions. [2023-02-15 01:02:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 01:02:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-02-15 01:02:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:35,006 INFO L225 Difference]: With dead ends: 780 [2023-02-15 01:02:35,006 INFO L226 Difference]: Without dead ends: 780 [2023-02-15 01:02:35,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 01:02:35,007 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 802 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:35,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 512 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:02:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-02-15 01:02:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 659. [2023-02-15 01:02:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 568 states have (on average 1.3098591549295775) internal successors, (744), 616 states have internal predecessors, (744), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 26 states have call predecessors, (64), 32 states have call successors, (64) [2023-02-15 01:02:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 840 transitions. [2023-02-15 01:02:35,018 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 840 transitions. Word has length 47 [2023-02-15 01:02:35,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:35,018 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 840 transitions. [2023-02-15 01:02:35,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 840 transitions. [2023-02-15 01:02:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 01:02:35,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:35,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:35,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-02-15 01:02:35,224 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2060267401, now seen corresponding path program 1 times [2023-02-15 01:02:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:35,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299980521] [2023-02-15 01:02:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:35,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 01:02:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 01:02:35,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:35,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299980521] [2023-02-15 01:02:35,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299980521] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:35,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:35,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:02:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245663515] [2023-02-15 01:02:35,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:35,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:02:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:02:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:02:35,288 INFO L87 Difference]: Start difference. First operand 659 states and 840 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:02:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:35,317 INFO L93 Difference]: Finished difference Result 828 states and 1048 transitions. [2023-02-15 01:02:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:02:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-15 01:02:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:35,318 INFO L225 Difference]: With dead ends: 828 [2023-02-15 01:02:35,318 INFO L226 Difference]: Without dead ends: 828 [2023-02-15 01:02:35,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:02:35,319 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 198 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:35,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 309 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:02:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-02-15 01:02:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 658. [2023-02-15 01:02:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 568 states have (on average 1.2992957746478873) internal successors, (738), 615 states have internal predecessors, (738), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 26 states have call predecessors, (64), 32 states have call successors, (64) [2023-02-15 01:02:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 834 transitions. [2023-02-15 01:02:35,326 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 834 transitions. Word has length 48 [2023-02-15 01:02:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:35,326 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 834 transitions. [2023-02-15 01:02:35,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:02:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 834 transitions. [2023-02-15 01:02:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 01:02:35,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:35,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:35,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-02-15 01:02:35,327 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash -556219847, now seen corresponding path program 1 times [2023-02-15 01:02:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:35,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830447953] [2023-02-15 01:02:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:36,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:36,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 01:02:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 01:02:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:36,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830447953] [2023-02-15 01:02:36,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830447953] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:36,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:36,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-02-15 01:02:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099105682] [2023-02-15 01:02:36,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:36,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 01:02:36,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 01:02:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-02-15 01:02:36,171 INFO L87 Difference]: Start difference. First operand 658 states and 834 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:02:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:38,433 INFO L93 Difference]: Finished difference Result 1335 states and 1658 transitions. [2023-02-15 01:02:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 01:02:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-02-15 01:02:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:38,444 INFO L225 Difference]: With dead ends: 1335 [2023-02-15 01:02:38,444 INFO L226 Difference]: Without dead ends: 1334 [2023-02-15 01:02:38,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=579, Invalid=1871, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 01:02:38,445 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1677 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:38,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 1862 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 01:02:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2023-02-15 01:02:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 629. [2023-02-15 01:02:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 543 states have (on average 1.292817679558011) internal successors, (702), 588 states have internal predecessors, (702), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 25 states have call predecessors, (60), 30 states have call successors, (60) [2023-02-15 01:02:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 792 transitions. [2023-02-15 01:02:38,454 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 792 transitions. Word has length 49 [2023-02-15 01:02:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:38,454 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 792 transitions. [2023-02-15 01:02:38,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:02:38,455 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 792 transitions. [2023-02-15 01:02:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 01:02:38,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:38,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:38,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2023-02-15 01:02:38,457 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -457059178, now seen corresponding path program 1 times [2023-02-15 01:02:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:38,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952621976] [2023-02-15 01:02:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:38,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:38,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952621976] [2023-02-15 01:02:38,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952621976] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:38,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:38,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 01:02:38,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545555597] [2023-02-15 01:02:38,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:38,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 01:02:38,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:38,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 01:02:38,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-15 01:02:38,805 INFO L87 Difference]: Start difference. First operand 629 states and 792 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:39,564 INFO L93 Difference]: Finished difference Result 748 states and 913 transitions. [2023-02-15 01:02:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 01:02:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-02-15 01:02:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:39,566 INFO L225 Difference]: With dead ends: 748 [2023-02-15 01:02:39,567 INFO L226 Difference]: Without dead ends: 748 [2023-02-15 01:02:39,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2023-02-15 01:02:39,567 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 558 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:39,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 830 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:02:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-02-15 01:02:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 629. [2023-02-15 01:02:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 543 states have (on average 1.292817679558011) internal successors, (702), 588 states have internal predecessors, (702), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 25 states have call predecessors, (60), 30 states have call successors, (60) [2023-02-15 01:02:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 792 transitions. [2023-02-15 01:02:39,575 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 792 transitions. Word has length 48 [2023-02-15 01:02:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:39,576 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 792 transitions. [2023-02-15 01:02:39,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 792 transitions. [2023-02-15 01:02:39,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 01:02:39,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:39,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:39,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-02-15 01:02:39,577 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:39,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1266405804, now seen corresponding path program 1 times [2023-02-15 01:02:39,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:39,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614991042] [2023-02-15 01:02:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:39,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:40,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614991042] [2023-02-15 01:02:40,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614991042] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:02:40,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:02:40,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 01:02:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772746055] [2023-02-15 01:02:40,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:02:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 01:02:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 01:02:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-02-15 01:02:40,184 INFO L87 Difference]: Start difference. First operand 629 states and 792 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:41,217 INFO L93 Difference]: Finished difference Result 883 states and 1080 transitions. [2023-02-15 01:02:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 01:02:41,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-02-15 01:02:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:41,219 INFO L225 Difference]: With dead ends: 883 [2023-02-15 01:02:41,219 INFO L226 Difference]: Without dead ends: 883 [2023-02-15 01:02:41,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 01:02:41,220 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1151 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:41,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 1338 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:02:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-02-15 01:02:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 617. [2023-02-15 01:02:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 531 states have (on average 1.2937853107344632) internal successors, (687), 576 states have internal predecessors, (687), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 25 states have call predecessors, (60), 30 states have call successors, (60) [2023-02-15 01:02:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 777 transitions. [2023-02-15 01:02:41,226 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 777 transitions. Word has length 48 [2023-02-15 01:02:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:41,226 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 777 transitions. [2023-02-15 01:02:41,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 777 transitions. [2023-02-15 01:02:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 01:02:41,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:41,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:41,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2023-02-15 01:02:41,228 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash 220633641, now seen corresponding path program 1 times [2023-02-15 01:02:41,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:41,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181101962] [2023-02-15 01:02:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:42,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:42,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 01:02:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 01:02:42,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:42,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181101962] [2023-02-15 01:02:42,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181101962] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:42,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752515085] [2023-02-15 01:02:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:42,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:42,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:42,297 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:42,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 01:02:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 01:02:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:42,670 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 15 treesize of output 11 [2023-02-15 01:02:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:42,712 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 30 treesize of output 23 [2023-02-15 01:02:42,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:42,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:42,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:42,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:02:42,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 52 [2023-02-15 01:02:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:43,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:02:43,365 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 88 treesize of output 82 [2023-02-15 01:02:43,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:43,393 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 88 treesize of output 82 [2023-02-15 01:02:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 01:02:43,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752515085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:02:43,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:02:43,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 18] total 52 [2023-02-15 01:02:43,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713071089] [2023-02-15 01:02:43,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:02:43,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 01:02:43,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:02:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 01:02:43,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2477, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 01:02:43,833 INFO L87 Difference]: Start difference. First operand 617 states and 777 transitions. Second operand has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 49 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:02:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:51,801 INFO L93 Difference]: Finished difference Result 1918 states and 2373 transitions. [2023-02-15 01:02:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 01:02:51,801 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 49 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2023-02-15 01:02:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:51,803 INFO L225 Difference]: With dead ends: 1918 [2023-02-15 01:02:51,804 INFO L226 Difference]: Without dead ends: 1917 [2023-02-15 01:02:51,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3177 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2398, Invalid=10942, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 01:02:51,806 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 5163 mSDsluCounter, 8097 mSDsCounter, 0 mSdLazyCounter, 6248 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5163 SdHoareTripleChecker+Valid, 8413 SdHoareTripleChecker+Invalid, 6584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 6248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:51,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5163 Valid, 8413 Invalid, 6584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [336 Valid, 6248 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-02-15 01:02:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2023-02-15 01:02:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 538. [2023-02-15 01:02:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 464 states have (on average 1.2887931034482758) internal successors, (598), 503 states have internal predecessors, (598), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 22 states have call predecessors, (48), 24 states have call successors, (48) [2023-02-15 01:02:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 670 transitions. [2023-02-15 01:02:51,820 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 670 transitions. Word has length 50 [2023-02-15 01:02:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:51,820 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 670 transitions. [2023-02-15 01:02:51,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 49 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:02:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 670 transitions. [2023-02-15 01:02:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 01:02:51,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:51,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:51,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:52,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:52,029 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:02:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash 483964998, now seen corresponding path program 1 times [2023-02-15 01:02:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:02:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454190700] [2023-02-15 01:02:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:52,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:02:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 01:02:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:54,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:02:54,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454190700] [2023-02-15 01:02:54,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454190700] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184790745] [2023-02-15 01:02:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:54,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:02:54,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:02:54,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:02:54,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 01:02:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-15 01:02:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:54,773 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 01:02:54,773 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 01:02:54,897 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 15 treesize of output 11 [2023-02-15 01:02:54,901 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 15 treesize of output 11 [2023-02-15 01:02:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:54,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 01:02:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:54,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 01:02:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-02-15 01:02:55,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 01:02:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-02-15 01:02:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:02:55,543 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-15 01:02:55,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 60 [2023-02-15 01:02:55,551 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 41 treesize of output 33 [2023-02-15 01:02:55,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:02:55,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 32 [2023-02-15 01:02:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:55,949 INFO L321 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2023-02-15 01:02:55,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 22 [2023-02-15 01:02:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:55,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:02:56,283 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse1 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1527 (Array Int Int)) (v_ArrVal_1525 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1527) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1525)) |c_~#list~0.base|) .cse2)) 4) 0)) (forall ((v_ArrVal_1525 Int)) (= (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1525)))) (select .cse3 (select (select .cse3 |c_~#list~0.base|) .cse2))) 4) 0)))) is different from false [2023-02-15 01:03:07,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:03:07,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 19298625 treesize of output 19133975