./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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-0218.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 d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:51:49,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:51:49,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:51:49,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:51:49,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:51:49,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:51:49,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:51:49,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:51:49,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:51:49,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:51:49,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:51:49,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:51:49,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:51:49,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:51:49,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:51:49,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:51:49,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:51:49,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:51:49,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:51:49,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:51:49,459 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:51:49,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:51:49,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:51:49,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:51:49,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:51:49,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:51:49,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:51:49,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:51:49,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:51:49,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:51:49,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:51:49,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:51:49,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:51:49,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:51:49,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:51:49,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:51:49,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:51:49,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:51:49,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:51:49,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:51:49,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:51:49,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:51:49,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:51:49,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:51:49,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:51:49,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:51:49,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:51:49,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:51:49,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:51:49,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:51:49,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:51:49,500 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:51:49,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:51:49,501 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:51:49,502 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:51:49,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:51:49,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:51:49,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:51:49,502 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:51:49,502 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:51:49,502 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:51:49,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:51:49,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:51:49,504 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:51:49,504 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:51:49,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:51:49,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:51:49,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:51:49,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:51:49,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:51:49,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:51:49,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:51:49,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:51:49,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2022-07-23 05:51:49,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:51:49,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:51:49,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:51:49,706 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:51:49,707 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:51:49,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0218.i [2022-07-23 05:51:49,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8288fadd/2e4c98a3a5bb481684ee1c8ab34d8749/FLAG9ab75654f [2022-07-23 05:51:50,142 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:51:50,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0218.i [2022-07-23 05:51:50,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8288fadd/2e4c98a3a5bb481684ee1c8ab34d8749/FLAG9ab75654f [2022-07-23 05:51:50,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8288fadd/2e4c98a3a5bb481684ee1c8ab34d8749 [2022-07-23 05:51:50,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:51:50,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:51:50,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:51:50,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:51:50,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:51:50,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4a525c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50, skipping insertion in model container [2022-07-23 05:51:50,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:51:50,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:51:50,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:51:50,829 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:51:50,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:51:50,894 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:51:50,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50 WrapperNode [2022-07-23 05:51:50,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:51:50,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:51:50,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:51:50,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:51:50,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,958 INFO L137 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 216 [2022-07-23 05:51:50,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:51:50,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:51:50,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:51:50,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:51:50,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:50,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:51:51,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:51:51,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:51:51,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:51:51,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (1/1) ... [2022-07-23 05:51:51,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:51:51,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:51,031 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) [2022-07-23 05:51:51,036 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 [2022-07-23 05:51:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-07-23 05:51:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-07-23 05:51:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:51:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 05:51:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 05:51:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 05:51:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:51:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 05:51:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 05:51:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:51:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:51:51,221 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:51:51,235 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:51:51,598 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:51:51,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:51:51,606 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-23 05:51:51,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:51:51 BoogieIcfgContainer [2022-07-23 05:51:51,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:51:51,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:51:51,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:51:51,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:51:51,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:51:50" (1/3) ... [2022-07-23 05:51:51,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f96208e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:51:51, skipping insertion in model container [2022-07-23 05:51:51,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:51:50" (2/3) ... [2022-07-23 05:51:51,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f96208e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:51:51, skipping insertion in model container [2022-07-23 05:51:51,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:51:51" (3/3) ... [2022-07-23 05:51:51,616 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0218.i [2022-07-23 05:51:51,628 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:51:51,629 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2022-07-23 05:51:51,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:51:51,693 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@413453cf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6b45f7c4 [2022-07-23 05:51:51,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2022-07-23 05:51:51,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 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) [2022-07-23 05:51:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:51:51,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:51,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:51:51,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1074826664, now seen corresponding path program 1 times [2022-07-23 05:51:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:51,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23671110] [2022-07-23 05:51:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:51,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:51,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23671110] [2022-07-23 05:51:51,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23671110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:51,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:51:51,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297766309] [2022-07-23 05:51:51,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-23 05:51:51,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-23 05:51:51,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-23 05:51:51,870 INFO L87 Difference]: Start difference. First operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 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) [2022-07-23 05:51:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:51,897 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2022-07-23 05:51:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-23 05:51:51,899 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 [2022-07-23 05:51:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:51,906 INFO L225 Difference]: With dead ends: 167 [2022-07-23 05:51:51,906 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 05:51:51,907 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 [2022-07-23 05:51:51,911 INFO L413 NwaCegarLoop]: 188 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, 188 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 [2022-07-23 05:51:51,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 05:51:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-23 05:51:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 161 states have internal predecessors, (182), 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) [2022-07-23 05:51:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2022-07-23 05:51:51,954 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 6 [2022-07-23 05:51:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:51,954 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2022-07-23 05:51:51,954 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) [2022-07-23 05:51:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2022-07-23 05:51:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:51:51,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:51,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:51:51,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321240, now seen corresponding path program 1 times [2022-07-23 05:51:51,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:51,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428469189] [2022-07-23 05:51:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:51,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:52,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:52,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428469189] [2022-07-23 05:51:52,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428469189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:52,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:52,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-23 05:51:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589060015] [2022-07-23 05:51:52,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:52,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:51:52,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:51:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:51:52,063 INFO L87 Difference]: Start difference. First operand 165 states and 186 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) [2022-07-23 05:51:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:52,256 INFO L93 Difference]: Finished difference Result 321 states and 362 transitions. [2022-07-23 05:51:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:51:52,256 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 [2022-07-23 05:51:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:52,259 INFO L225 Difference]: With dead ends: 321 [2022-07-23 05:51:52,259 INFO L226 Difference]: Without dead ends: 321 [2022-07-23 05:51:52,260 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 [2022-07-23 05:51:52,261 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 167 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:52,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 245 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-23 05:51:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 227. [2022-07-23 05:51:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 156 states have (on average 1.858974358974359) internal successors, (290), 220 states have internal predecessors, (290), 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) [2022-07-23 05:51:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 298 transitions. [2022-07-23 05:51:52,310 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 298 transitions. Word has length 7 [2022-07-23 05:51:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:52,310 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 298 transitions. [2022-07-23 05:51:52,310 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) [2022-07-23 05:51:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 298 transitions. [2022-07-23 05:51:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:51:52,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:52,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:52,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:51:52,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321239, now seen corresponding path program 1 times [2022-07-23 05:51:52,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:52,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237025632] [2022-07-23 05:51:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:52,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:52,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:52,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237025632] [2022-07-23 05:51:52,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237025632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:52,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:52,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:51:52,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165954701] [2022-07-23 05:51:52,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:52,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:52,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:52,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:52,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:52,396 INFO L87 Difference]: Start difference. First operand 227 states and 298 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) [2022-07-23 05:51:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:52,506 INFO L93 Difference]: Finished difference Result 245 states and 316 transitions. [2022-07-23 05:51:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:52,507 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 [2022-07-23 05:51:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:52,508 INFO L225 Difference]: With dead ends: 245 [2022-07-23 05:51:52,508 INFO L226 Difference]: Without dead ends: 245 [2022-07-23 05:51:52,508 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 [2022-07-23 05:51:52,509 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 214 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:52,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 253 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-23 05:51:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2022-07-23 05:51:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 158 states have (on average 1.8544303797468353) internal successors, (293), 222 states have internal predecessors, (293), 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) [2022-07-23 05:51:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2022-07-23 05:51:52,517 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 7 [2022-07-23 05:51:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:52,517 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2022-07-23 05:51:52,517 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) [2022-07-23 05:51:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2022-07-23 05:51:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:51:52,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:52,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:52,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:51:52,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321301, now seen corresponding path program 1 times [2022-07-23 05:51:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:52,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717100935] [2022-07-23 05:51:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717100935] [2022-07-23 05:51:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717100935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:52,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:52,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:51:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054358317] [2022-07-23 05:51:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:52,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:52,590 INFO L87 Difference]: Start difference. First operand 229 states and 301 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) [2022-07-23 05:51:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:52,699 INFO L93 Difference]: Finished difference Result 244 states and 314 transitions. [2022-07-23 05:51:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:52,700 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 [2022-07-23 05:51:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:52,701 INFO L225 Difference]: With dead ends: 244 [2022-07-23 05:51:52,701 INFO L226 Difference]: Without dead ends: 244 [2022-07-23 05:51:52,701 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 [2022-07-23 05:51:52,702 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:52,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 266 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-23 05:51:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 226. [2022-07-23 05:51:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 156 states have (on average 1.8461538461538463) internal successors, (288), 219 states have internal predecessors, (288), 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) [2022-07-23 05:51:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 296 transitions. [2022-07-23 05:51:52,709 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 296 transitions. Word has length 7 [2022-07-23 05:51:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:52,710 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 296 transitions. [2022-07-23 05:51:52,710 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) [2022-07-23 05:51:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 296 transitions. [2022-07-23 05:51:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:51:52,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:52,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:52,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:51:52,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1554740496, now seen corresponding path program 1 times [2022-07-23 05:51:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201682415] [2022-07-23 05:51:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:52,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:52,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:52,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201682415] [2022-07-23 05:51:52,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201682415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:52,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:52,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:52,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773097107] [2022-07-23 05:51:52,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:52,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:52,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:52,800 INFO L87 Difference]: Start difference. First operand 226 states and 296 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) [2022-07-23 05:51:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:52,950 INFO L93 Difference]: Finished difference Result 402 states and 517 transitions. [2022-07-23 05:51:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:51:52,951 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 [2022-07-23 05:51:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:52,953 INFO L225 Difference]: With dead ends: 402 [2022-07-23 05:51:52,953 INFO L226 Difference]: Without dead ends: 402 [2022-07-23 05:51:52,954 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 [2022-07-23 05:51:52,955 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 145 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:52,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 782 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-23 05:51:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2022-07-23 05:51:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 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) [2022-07-23 05:51:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2022-07-23 05:51:52,963 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2022-07-23 05:51:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:52,964 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2022-07-23 05:51:52,964 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) [2022-07-23 05:51:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2022-07-23 05:51:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:51:52,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:52,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:52,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:51:52,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1552893454, now seen corresponding path program 1 times [2022-07-23 05:51:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:52,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512054684] [2022-07-23 05:51:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:52,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:53,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512054684] [2022-07-23 05:51:53,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512054684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:53,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:53,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:53,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737641426] [2022-07-23 05:51:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:53,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:53,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:53,053 INFO L87 Difference]: Start difference. First operand 292 states and 403 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) [2022-07-23 05:51:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:53,224 INFO L93 Difference]: Finished difference Result 392 states and 506 transitions. [2022-07-23 05:51:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:51:53,225 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 [2022-07-23 05:51:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:53,226 INFO L225 Difference]: With dead ends: 392 [2022-07-23 05:51:53,226 INFO L226 Difference]: Without dead ends: 392 [2022-07-23 05:51:53,226 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 [2022-07-23 05:51:53,227 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 131 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:53,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 791 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-23 05:51:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 292. [2022-07-23 05:51:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 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) [2022-07-23 05:51:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2022-07-23 05:51:53,233 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2022-07-23 05:51:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:53,234 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2022-07-23 05:51:53,234 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) [2022-07-23 05:51:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2022-07-23 05:51:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:51:53,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:53,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:53,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:51:53,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash 952313872, now seen corresponding path program 1 times [2022-07-23 05:51:53,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:53,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713055229] [2022-07-23 05:51:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713055229] [2022-07-23 05:51:53,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713055229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:53,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:53,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:51:53,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903695491] [2022-07-23 05:51:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:53,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:51:53,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:51:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:51:53,251 INFO L87 Difference]: Start difference. First operand 292 states and 403 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) [2022-07-23 05:51:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:53,330 INFO L93 Difference]: Finished difference Result 347 states and 456 transitions. [2022-07-23 05:51:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:51:53,330 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 [2022-07-23 05:51:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:53,347 INFO L225 Difference]: With dead ends: 347 [2022-07-23 05:51:53,347 INFO L226 Difference]: Without dead ends: 340 [2022-07-23 05:51:53,348 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 [2022-07-23 05:51:53,359 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 70 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:53,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 279 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-23 05:51:53,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 289. [2022-07-23 05:51:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 213 states have (on average 1.7934272300469483) internal successors, (382), 278 states have internal predecessors, (382), 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) [2022-07-23 05:51:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 398 transitions. [2022-07-23 05:51:53,365 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 398 transitions. Word has length 11 [2022-07-23 05:51:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:53,365 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 398 transitions. [2022-07-23 05:51:53,365 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) [2022-07-23 05:51:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 398 transitions. [2022-07-23 05:51:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:51:53,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:53,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:53,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:51:53,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash -41167145, now seen corresponding path program 1 times [2022-07-23 05:51:53,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:53,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405384453] [2022-07-23 05:51:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:53,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405384453] [2022-07-23 05:51:53,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405384453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:53,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:53,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:51:53,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692707339] [2022-07-23 05:51:53,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:53,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:53,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:53,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:53,411 INFO L87 Difference]: Start difference. First operand 289 states and 398 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) [2022-07-23 05:51:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:53,605 INFO L93 Difference]: Finished difference Result 490 states and 599 transitions. [2022-07-23 05:51:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:53,605 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 [2022-07-23 05:51:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:53,607 INFO L225 Difference]: With dead ends: 490 [2022-07-23 05:51:53,608 INFO L226 Difference]: Without dead ends: 490 [2022-07-23 05:51:53,608 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 [2022-07-23 05:51:53,609 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 319 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:53,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 426 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-07-23 05:51:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 295. [2022-07-23 05:51:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 219 states have (on average 1.7716894977168949) internal successors, (388), 284 states have internal predecessors, (388), 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) [2022-07-23 05:51:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 404 transitions. [2022-07-23 05:51:53,626 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 404 transitions. Word has length 15 [2022-07-23 05:51:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:53,626 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 404 transitions. [2022-07-23 05:51:53,626 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) [2022-07-23 05:51:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 404 transitions. [2022-07-23 05:51:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:51:53,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:53,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:53,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:51:53,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash -41167144, now seen corresponding path program 1 times [2022-07-23 05:51:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:53,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193538491] [2022-07-23 05:51:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:53,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:53,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193538491] [2022-07-23 05:51:53,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193538491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:53,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:53,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:51:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082549615] [2022-07-23 05:51:53,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:53,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:53,698 INFO L87 Difference]: Start difference. First operand 295 states and 404 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) [2022-07-23 05:51:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:53,821 INFO L93 Difference]: Finished difference Result 393 states and 512 transitions. [2022-07-23 05:51:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:53,821 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 [2022-07-23 05:51:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:53,824 INFO L225 Difference]: With dead ends: 393 [2022-07-23 05:51:53,824 INFO L226 Difference]: Without dead ends: 393 [2022-07-23 05:51:53,824 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 [2022-07-23 05:51:53,826 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 343 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:53,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 270 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-23 05:51:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 292. [2022-07-23 05:51:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 219 states have (on average 1.7168949771689497) internal successors, (376), 281 states have internal predecessors, (376), 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) [2022-07-23 05:51:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 392 transitions. [2022-07-23 05:51:53,834 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 392 transitions. Word has length 15 [2022-07-23 05:51:53,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:53,834 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 392 transitions. [2022-07-23 05:51:53,834 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) [2022-07-23 05:51:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 392 transitions. [2022-07-23 05:51:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:51:53,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:53,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:53,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 05:51:53,836 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash 85672930, now seen corresponding path program 1 times [2022-07-23 05:51:53,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:53,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932841528] [2022-07-23 05:51:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:53,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:53,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932841528] [2022-07-23 05:51:53,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932841528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:53,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:53,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:51:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356335914] [2022-07-23 05:51:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:51:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:51:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:51:53,918 INFO L87 Difference]: Start difference. First operand 292 states and 392 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-23 05:51:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:54,237 INFO L93 Difference]: Finished difference Result 628 states and 735 transitions. [2022-07-23 05:51:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:51:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2022-07-23 05:51:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:54,239 INFO L225 Difference]: With dead ends: 628 [2022-07-23 05:51:54,239 INFO L226 Difference]: Without dead ends: 628 [2022-07-23 05:51:54,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:51:54,240 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 763 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:54,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 538 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:51:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-07-23 05:51:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 289. [2022-07-23 05:51:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 278 states have internal predecessors, (370), 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) [2022-07-23 05:51:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 386 transitions. [2022-07-23 05:51:54,246 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 386 transitions. Word has length 17 [2022-07-23 05:51:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:54,246 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 386 transitions. [2022-07-23 05:51:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-23 05:51:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 386 transitions. [2022-07-23 05:51:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:51:54,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:54,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:54,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-23 05:51:54,247 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash 85672931, now seen corresponding path program 1 times [2022-07-23 05:51:54,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:54,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541541822] [2022-07-23 05:51:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:54,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:54,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:54,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:54,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541541822] [2022-07-23 05:51:54,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541541822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:54,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:54,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012046608] [2022-07-23 05:51:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:54,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:54,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:54,321 INFO L87 Difference]: Start difference. First operand 289 states and 386 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-23 05:51:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:54,590 INFO L93 Difference]: Finished difference Result 594 states and 794 transitions. [2022-07-23 05:51:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:51:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2022-07-23 05:51:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:54,593 INFO L225 Difference]: With dead ends: 594 [2022-07-23 05:51:54,593 INFO L226 Difference]: Without dead ends: 594 [2022-07-23 05:51:54,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:51:54,594 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 538 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:54,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 696 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-07-23 05:51:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 351. [2022-07-23 05:51:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.6654676258992807) internal successors, (463), 338 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 487 transitions. [2022-07-23 05:51:54,601 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 487 transitions. Word has length 17 [2022-07-23 05:51:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:54,601 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 487 transitions. [2022-07-23 05:51:54,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-23 05:51:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 487 transitions. [2022-07-23 05:51:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:51:54,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:54,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:54,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 05:51:54,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:54,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1721781532, now seen corresponding path program 1 times [2022-07-23 05:51:54,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:54,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582839374] [2022-07-23 05:51:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:54,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582839374] [2022-07-23 05:51:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582839374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:54,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:54,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:51:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332969240] [2022-07-23 05:51:54,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:54,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:54,660 INFO L87 Difference]: Start difference. First operand 351 states and 487 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-23 05:51:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:54,696 INFO L93 Difference]: Finished difference Result 559 states and 756 transitions. [2022-07-23 05:51:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:51:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2022-07-23 05:51:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:54,698 INFO L225 Difference]: With dead ends: 559 [2022-07-23 05:51:54,698 INFO L226 Difference]: Without dead ends: 559 [2022-07-23 05:51:54,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:51:54,699 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 231 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:54,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1489 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-07-23 05:51:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2022-07-23 05:51:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.658273381294964) internal successors, (461), 338 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 485 transitions. [2022-07-23 05:51:54,706 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 485 transitions. Word has length 17 [2022-07-23 05:51:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:54,706 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 485 transitions. [2022-07-23 05:51:54,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-23 05:51:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 485 transitions. [2022-07-23 05:51:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:51:54,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:54,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:54,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-23 05:51:54,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1835564363, now seen corresponding path program 1 times [2022-07-23 05:51:54,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:54,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178853123] [2022-07-23 05:51:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:54,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:54,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178853123] [2022-07-23 05:51:54,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178853123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:54,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:54,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:54,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058394870] [2022-07-23 05:51:54,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:54,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:54,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:54,805 INFO L87 Difference]: Start difference. First operand 351 states and 485 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-07-23 05:51:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:55,114 INFO L93 Difference]: Finished difference Result 635 states and 863 transitions. [2022-07-23 05:51:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:51:55,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 18 [2022-07-23 05:51:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:55,116 INFO L225 Difference]: With dead ends: 635 [2022-07-23 05:51:55,116 INFO L226 Difference]: Without dead ends: 635 [2022-07-23 05:51:55,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:51:55,117 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 450 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:55,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 834 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-07-23 05:51:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 346. [2022-07-23 05:51:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.6593406593406594) internal successors, (453), 333 states have internal predecessors, (453), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 477 transitions. [2022-07-23 05:51:55,128 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 477 transitions. Word has length 18 [2022-07-23 05:51:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:55,128 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 477 transitions. [2022-07-23 05:51:55,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-07-23 05:51:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 477 transitions. [2022-07-23 05:51:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:51:55,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:55,130 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] [2022-07-23 05:51:55,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-23 05:51:55,130 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:55,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1066754491, now seen corresponding path program 1 times [2022-07-23 05:51:55,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:55,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165851221] [2022-07-23 05:51:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:55,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:55,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:55,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165851221] [2022-07-23 05:51:55,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165851221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:55,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:55,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:51:55,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658525429] [2022-07-23 05:51:55,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:55,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:51:55,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:55,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:51:55,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:51:55,369 INFO L87 Difference]: Start difference. First operand 346 states and 477 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) [2022-07-23 05:51:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:55,865 INFO L93 Difference]: Finished difference Result 753 states and 1012 transitions. [2022-07-23 05:51:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:51:55,866 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 [2022-07-23 05:51:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:55,868 INFO L225 Difference]: With dead ends: 753 [2022-07-23 05:51:55,868 INFO L226 Difference]: Without dead ends: 751 [2022-07-23 05:51:55,868 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 [2022-07-23 05:51:55,869 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 563 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:55,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1626 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-07-23 05:51:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 340. [2022-07-23 05:51:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 267 states have (on average 1.655430711610487) internal successors, (442), 327 states have internal predecessors, (442), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 466 transitions. [2022-07-23 05:51:55,877 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 466 transitions. Word has length 21 [2022-07-23 05:51:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:55,877 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 466 transitions. [2022-07-23 05:51:55,877 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) [2022-07-23 05:51:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 466 transitions. [2022-07-23 05:51:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:51:55,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:55,878 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] [2022-07-23 05:51:55,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-23 05:51:55,878 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1136706200, now seen corresponding path program 1 times [2022-07-23 05:51:55,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:55,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180260515] [2022-07-23 05:51:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:55,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:55,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:55,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180260515] [2022-07-23 05:51:55,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180260515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:55,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:55,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:51:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903103348] [2022-07-23 05:51:55,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:55,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:51:55,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:51:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:51:55,996 INFO L87 Difference]: Start difference. First operand 340 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2022-07-23 05:51:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:56,253 INFO L93 Difference]: Finished difference Result 496 states and 644 transitions. [2022-07-23 05:51:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:51:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 [2022-07-23 05:51:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:56,255 INFO L225 Difference]: With dead ends: 496 [2022-07-23 05:51:56,255 INFO L226 Difference]: Without dead ends: 496 [2022-07-23 05:51:56,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:51:56,256 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 193 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:56,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1052 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-23 05:51:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 356. [2022-07-23 05:51:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6289752650176679) internal successors, (461), 341 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 485 transitions. [2022-07-23 05:51:56,263 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 485 transitions. Word has length 21 [2022-07-23 05:51:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:56,263 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 485 transitions. [2022-07-23 05:51:56,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2022-07-23 05:51:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 485 transitions. [2022-07-23 05:51:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:51:56,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:56,264 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] [2022-07-23 05:51:56,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-23 05:51:56,264 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:56,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:56,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1088554597, now seen corresponding path program 1 times [2022-07-23 05:51:56,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:56,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985262217] [2022-07-23 05:51:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:56,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:56,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:56,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985262217] [2022-07-23 05:51:56,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985262217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:56,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:56,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:51:56,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53409853] [2022-07-23 05:51:56,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:56,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:56,323 INFO L87 Difference]: Start difference. First operand 356 states and 485 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-23 05:51:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:56,386 INFO L93 Difference]: Finished difference Result 610 states and 833 transitions. [2022-07-23 05:51:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:51:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-07-23 05:51:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:56,389 INFO L225 Difference]: With dead ends: 610 [2022-07-23 05:51:56,389 INFO L226 Difference]: Without dead ends: 610 [2022-07-23 05:51:56,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:51:56,390 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 233 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:56,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1195 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-07-23 05:51:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 358. [2022-07-23 05:51:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 285 states have (on average 1.6245614035087719) internal successors, (463), 343 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 487 transitions. [2022-07-23 05:51:56,411 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 487 transitions. Word has length 22 [2022-07-23 05:51:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:56,411 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 487 transitions. [2022-07-23 05:51:56,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-23 05:51:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 487 transitions. [2022-07-23 05:51:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:51:56,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:56,412 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] [2022-07-23 05:51:56,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-23 05:51:56,412 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:56,413 INFO L85 PathProgramCache]: Analyzing trace with hash 686452765, now seen corresponding path program 1 times [2022-07-23 05:51:56,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:56,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466735467] [2022-07-23 05:51:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:56,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:56,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466735467] [2022-07-23 05:51:56,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466735467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:56,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:56,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:51:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451533493] [2022-07-23 05:51:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:56,493 INFO L87 Difference]: Start difference. First operand 358 states and 487 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-23 05:51:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:56,550 INFO L93 Difference]: Finished difference Result 606 states and 825 transitions. [2022-07-23 05:51:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:51:56,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-07-23 05:51:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:56,552 INFO L225 Difference]: With dead ends: 606 [2022-07-23 05:51:56,552 INFO L226 Difference]: Without dead ends: 606 [2022-07-23 05:51:56,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:51:56,553 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 230 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:56,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1211 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-07-23 05:51:56,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 356. [2022-07-23 05:51:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6148409893992932) internal successors, (457), 341 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2022-07-23 05:51:56,560 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 22 [2022-07-23 05:51:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:56,561 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2022-07-23 05:51:56,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-23 05:51:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2022-07-23 05:51:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:51:56,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:56,562 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] [2022-07-23 05:51:56,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-23 05:51:56,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1594113222, now seen corresponding path program 1 times [2022-07-23 05:51:56,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:56,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430943677] [2022-07-23 05:51:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:56,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430943677] [2022-07-23 05:51:56,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430943677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:56,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:56,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:51:56,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118996034] [2022-07-23 05:51:56,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:56,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:51:56,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:51:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:51:56,634 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-07-23 05:51:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:56,869 INFO L93 Difference]: Finished difference Result 540 states and 714 transitions. [2022-07-23 05:51:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:51:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 22 [2022-07-23 05:51:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:56,871 INFO L225 Difference]: With dead ends: 540 [2022-07-23 05:51:56,871 INFO L226 Difference]: Without dead ends: 540 [2022-07-23 05:51:56,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:51:56,872 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 188 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:56,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1215 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-23 05:51:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 366. [2022-07-23 05:51:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 293 states have (on average 1.6006825938566553) internal successors, (469), 349 states have internal predecessors, (469), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 493 transitions. [2022-07-23 05:51:56,878 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 493 transitions. Word has length 22 [2022-07-23 05:51:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:56,879 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 493 transitions. [2022-07-23 05:51:56,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-07-23 05:51:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 493 transitions. [2022-07-23 05:51:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:51:56,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:56,879 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] [2022-07-23 05:51:56,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-23 05:51:56,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476602, now seen corresponding path program 1 times [2022-07-23 05:51:56,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:56,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279585560] [2022-07-23 05:51:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:56,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:56,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279585560] [2022-07-23 05:51:56,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279585560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:56,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:56,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:51:56,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883816583] [2022-07-23 05:51:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:56,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:56,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:56,908 INFO L87 Difference]: Start difference. First operand 366 states and 493 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) [2022-07-23 05:51:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:57,068 INFO L93 Difference]: Finished difference Result 583 states and 733 transitions. [2022-07-23 05:51:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:57,068 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 [2022-07-23 05:51:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:57,070 INFO L225 Difference]: With dead ends: 583 [2022-07-23 05:51:57,071 INFO L226 Difference]: Without dead ends: 583 [2022-07-23 05:51:57,071 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 [2022-07-23 05:51:57,071 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 287 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:57,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 425 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-07-23 05:51:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 384. [2022-07-23 05:51:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 311 states have (on average 1.617363344051447) internal successors, (503), 367 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 527 transitions. [2022-07-23 05:51:57,079 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 527 transitions. Word has length 23 [2022-07-23 05:51:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:57,080 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 527 transitions. [2022-07-23 05:51:57,080 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) [2022-07-23 05:51:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 527 transitions. [2022-07-23 05:51:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:51:57,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:57,080 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] [2022-07-23 05:51:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-23 05:51:57,081 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476601, now seen corresponding path program 1 times [2022-07-23 05:51:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38570635] [2022-07-23 05:51:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:57,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:57,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38570635] [2022-07-23 05:51:57,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38570635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:57,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:57,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292992434] [2022-07-23 05:51:57,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:57,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:57,180 INFO L87 Difference]: Start difference. First operand 384 states and 527 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) [2022-07-23 05:51:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:57,422 INFO L93 Difference]: Finished difference Result 516 states and 688 transitions. [2022-07-23 05:51:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:51:57,422 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 [2022-07-23 05:51:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:57,424 INFO L225 Difference]: With dead ends: 516 [2022-07-23 05:51:57,424 INFO L226 Difference]: Without dead ends: 516 [2022-07-23 05:51:57,425 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 [2022-07-23 05:51:57,425 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 642 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:57,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 324 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-23 05:51:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 381. [2022-07-23 05:51:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 311 states have (on average 1.5787781350482315) internal successors, (491), 364 states have internal predecessors, (491), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2022-07-23 05:51:57,444 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 23 [2022-07-23 05:51:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:57,445 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2022-07-23 05:51:57,445 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) [2022-07-23 05:51:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2022-07-23 05:51:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:51:57,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:57,445 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] [2022-07-23 05:51:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-23 05:51:57,446 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash -740334691, now seen corresponding path program 1 times [2022-07-23 05:51:57,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:57,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556476582] [2022-07-23 05:51:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:57,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:57,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556476582] [2022-07-23 05:51:57,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556476582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:57,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:57,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:51:57,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277488314] [2022-07-23 05:51:57,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:57,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:57,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:57,480 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2022-07-23 05:51:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:57,508 INFO L93 Difference]: Finished difference Result 397 states and 531 transitions. [2022-07-23 05:51:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:51:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 [2022-07-23 05:51:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:57,510 INFO L225 Difference]: With dead ends: 397 [2022-07-23 05:51:57,510 INFO L226 Difference]: Without dead ends: 397 [2022-07-23 05:51:57,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:51:57,511 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 3 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:57,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-23 05:51:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2022-07-23 05:51:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 323 states have (on average 1.5572755417956656) internal successors, (503), 376 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 527 transitions. [2022-07-23 05:51:57,516 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 527 transitions. Word has length 25 [2022-07-23 05:51:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:57,517 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 527 transitions. [2022-07-23 05:51:57,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2022-07-23 05:51:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 527 transitions. [2022-07-23 05:51:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:51:57,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:57,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:51:57,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-23 05:51:57,518 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash -738487649, now seen corresponding path program 1 times [2022-07-23 05:51:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:57,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524740518] [2022-07-23 05:51:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:57,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524740518] [2022-07-23 05:51:57,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524740518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:57,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:57,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:51:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340233272] [2022-07-23 05:51:57,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:57,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:57,572 INFO L87 Difference]: Start difference. First operand 393 states and 527 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2022-07-23 05:51:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:57,696 INFO L93 Difference]: Finished difference Result 770 states and 1027 transitions. [2022-07-23 05:51:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:57,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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 [2022-07-23 05:51:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:57,700 INFO L225 Difference]: With dead ends: 770 [2022-07-23 05:51:57,701 INFO L226 Difference]: Without dead ends: 770 [2022-07-23 05:51:57,701 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 [2022-07-23 05:51:57,701 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 464 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:57,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 404 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-07-23 05:51:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 469. [2022-07-23 05:51:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 399 states have (on average 1.5413533834586466) internal successors, (615), 452 states have internal predecessors, (615), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 639 transitions. [2022-07-23 05:51:57,709 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 639 transitions. Word has length 25 [2022-07-23 05:51:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:57,710 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 639 transitions. [2022-07-23 05:51:57,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2022-07-23 05:51:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 639 transitions. [2022-07-23 05:51:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:51:57,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:57,710 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] [2022-07-23 05:51:57,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-23 05:51:57,711 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:57,711 INFO L85 PathProgramCache]: Analyzing trace with hash -738487650, now seen corresponding path program 1 times [2022-07-23 05:51:57,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:57,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604104044] [2022-07-23 05:51:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:57,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:57,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604104044] [2022-07-23 05:51:57,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604104044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:57,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:57,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:51:57,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348712166] [2022-07-23 05:51:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:51:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:51:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:51:57,729 INFO L87 Difference]: Start difference. First operand 469 states and 639 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 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) [2022-07-23 05:51:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:57,801 INFO L93 Difference]: Finished difference Result 560 states and 741 transitions. [2022-07-23 05:51:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:51:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 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 [2022-07-23 05:51:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:57,803 INFO L225 Difference]: With dead ends: 560 [2022-07-23 05:51:57,803 INFO L226 Difference]: Without dead ends: 560 [2022-07-23 05:51:57,803 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 [2022-07-23 05:51:57,804 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 139 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:57,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:57,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-07-23 05:51:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 467. [2022-07-23 05:51:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2022-07-23 05:51:57,811 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 25 [2022-07-23 05:51:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:57,811 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2022-07-23 05:51:57,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 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) [2022-07-23 05:51:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2022-07-23 05:51:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 05:51:57,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:57,812 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, 1, 1, 1] [2022-07-23 05:51:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-23 05:51:57,813 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:57,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1484578673, now seen corresponding path program 1 times [2022-07-23 05:51:57,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:57,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573518718] [2022-07-23 05:51:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573518718] [2022-07-23 05:51:57,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573518718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:57,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:57,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:51:57,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213039952] [2022-07-23 05:51:57,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:57,848 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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) [2022-07-23 05:51:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:57,978 INFO L93 Difference]: Finished difference Result 842 states and 1119 transitions. [2022-07-23 05:51:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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 [2022-07-23 05:51:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:57,981 INFO L225 Difference]: With dead ends: 842 [2022-07-23 05:51:57,981 INFO L226 Difference]: Without dead ends: 842 [2022-07-23 05:51:57,981 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 [2022-07-23 05:51:57,982 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 305 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:57,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 581 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-07-23 05:51:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 467. [2022-07-23 05:51:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2022-07-23 05:51:57,990 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 26 [2022-07-23 05:51:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:57,990 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2022-07-23 05:51:57,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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) [2022-07-23 05:51:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2022-07-23 05:51:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 05:51:57,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:57,990 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] [2022-07-23 05:51:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-23 05:51:57,991 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2109324045, now seen corresponding path program 1 times [2022-07-23 05:51:57,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:57,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677755666] [2022-07-23 05:51:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:58,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:58,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677755666] [2022-07-23 05:51:58,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677755666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:58,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:58,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:51:58,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608659931] [2022-07-23 05:51:58,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:58,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:58,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:58,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:58,047 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-07-23 05:51:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:58,080 INFO L93 Difference]: Finished difference Result 666 states and 882 transitions. [2022-07-23 05:51:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:51:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 [2022-07-23 05:51:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:58,082 INFO L225 Difference]: With dead ends: 666 [2022-07-23 05:51:58,082 INFO L226 Difference]: Without dead ends: 666 [2022-07-23 05:51:58,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:51:58,083 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 222 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:58,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1432 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-07-23 05:51:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2022-07-23 05:51:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5077399380804954) internal successors, (487), 373 states have internal predecessors, (487), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 511 transitions. [2022-07-23 05:51:58,090 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 511 transitions. Word has length 26 [2022-07-23 05:51:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:58,090 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 511 transitions. [2022-07-23 05:51:58,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-07-23 05:51:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 511 transitions. [2022-07-23 05:51:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:51:58,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:58,091 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] [2022-07-23 05:51:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-23 05:51:58,091 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1817784781, now seen corresponding path program 1 times [2022-07-23 05:51:58,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:58,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204566793] [2022-07-23 05:51:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:58,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:58,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204566793] [2022-07-23 05:51:58,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204566793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:58,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:58,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:51:58,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091651317] [2022-07-23 05:51:58,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:58,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:51:58,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:51:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:51:58,134 INFO L87 Difference]: Start difference. First operand 390 states and 511 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) [2022-07-23 05:51:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:58,241 INFO L93 Difference]: Finished difference Result 472 states and 596 transitions. [2022-07-23 05:51:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:51:58,242 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 [2022-07-23 05:51:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:58,243 INFO L225 Difference]: With dead ends: 472 [2022-07-23 05:51:58,243 INFO L226 Difference]: Without dead ends: 472 [2022-07-23 05:51:58,243 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 [2022-07-23 05:51:58,244 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 163 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:58,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 626 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-07-23 05:51:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 390. [2022-07-23 05:51:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5046439628482973) internal successors, (486), 373 states have internal predecessors, (486), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2022-07-23 05:51:58,250 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 27 [2022-07-23 05:51:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:58,250 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2022-07-23 05:51:58,250 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) [2022-07-23 05:51:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2022-07-23 05:51:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:51:58,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:58,251 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] [2022-07-23 05:51:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-23 05:51:58,251 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025601, now seen corresponding path program 1 times [2022-07-23 05:51:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33742953] [2022-07-23 05:51:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:58,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:58,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33742953] [2022-07-23 05:51:58,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33742953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:58,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:58,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:51:58,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730648629] [2022-07-23 05:51:58,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:58,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:51:58,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:51:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:51:58,300 INFO L87 Difference]: Start difference. First operand 390 states and 510 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-07-23 05:51:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:58,432 INFO L93 Difference]: Finished difference Result 589 states and 763 transitions. [2022-07-23 05:51:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:51:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 [2022-07-23 05:51:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:58,434 INFO L225 Difference]: With dead ends: 589 [2022-07-23 05:51:58,434 INFO L226 Difference]: Without dead ends: 589 [2022-07-23 05:51:58,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:51:58,434 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 149 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:58,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1213 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-07-23 05:51:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 422. [2022-07-23 05:51:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 355 states have (on average 1.476056338028169) internal successors, (524), 405 states have internal predecessors, (524), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 548 transitions. [2022-07-23 05:51:58,441 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 548 transitions. Word has length 27 [2022-07-23 05:51:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:58,442 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 548 transitions. [2022-07-23 05:51:58,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-07-23 05:51:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 548 transitions. [2022-07-23 05:51:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:51:58,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:58,442 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] [2022-07-23 05:51:58,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-23 05:51:58,443 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025407, now seen corresponding path program 1 times [2022-07-23 05:51:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:58,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468964085] [2022-07-23 05:51:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:58,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468964085] [2022-07-23 05:51:58,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468964085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:58,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:58,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:51:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895169251] [2022-07-23 05:51:58,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:51:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:51:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:51:58,484 INFO L87 Difference]: Start difference. First operand 422 states and 548 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) [2022-07-23 05:51:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:58,588 INFO L93 Difference]: Finished difference Result 828 states and 1070 transitions. [2022-07-23 05:51:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:51:58,588 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 [2022-07-23 05:51:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:58,590 INFO L225 Difference]: With dead ends: 828 [2022-07-23 05:51:58,591 INFO L226 Difference]: Without dead ends: 828 [2022-07-23 05:51:58,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:58,591 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 440 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:58,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 659 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-07-23 05:51:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 538. [2022-07-23 05:51:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 471 states have (on average 1.4564755838641188) internal successors, (686), 521 states have internal predecessors, (686), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:51:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 710 transitions. [2022-07-23 05:51:58,599 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 710 transitions. Word has length 27 [2022-07-23 05:51:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:58,599 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 710 transitions. [2022-07-23 05:51:58,599 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) [2022-07-23 05:51:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 710 transitions. [2022-07-23 05:51:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:51:58,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:58,600 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] [2022-07-23 05:51:58,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-23 05:51:58,600 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash 516753601, now seen corresponding path program 1 times [2022-07-23 05:51:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:58,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316727241] [2022-07-23 05:51:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:58,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316727241] [2022-07-23 05:51:58,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316727241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:58,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:58,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:51:58,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843583640] [2022-07-23 05:51:58,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:58,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:51:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:51:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:51:58,652 INFO L87 Difference]: Start difference. First operand 538 states and 710 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) [2022-07-23 05:51:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:58,798 INFO L93 Difference]: Finished difference Result 783 states and 1007 transitions. [2022-07-23 05:51:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:51:58,798 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 [2022-07-23 05:51:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:58,800 INFO L225 Difference]: With dead ends: 783 [2022-07-23 05:51:58,800 INFO L226 Difference]: Without dead ends: 783 [2022-07-23 05:51:58,800 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 [2022-07-23 05:51:58,801 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 218 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:58,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 635 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-07-23 05:51:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 576. [2022-07-23 05:51:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 505 states have (on average 1.4574257425742574) internal successors, (736), 557 states have internal predecessors, (736), 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) [2022-07-23 05:51:58,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 766 transitions. [2022-07-23 05:51:58,809 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 766 transitions. Word has length 28 [2022-07-23 05:51:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:58,809 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 766 transitions. [2022-07-23 05:51:58,809 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) [2022-07-23 05:51:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 766 transitions. [2022-07-23 05:51:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:51:58,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:58,810 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] [2022-07-23 05:51:58,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-23 05:51:58,810 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash 750963923, now seen corresponding path program 1 times [2022-07-23 05:51:58,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:58,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408894496] [2022-07-23 05:51:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:58,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:51:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:58,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408894496] [2022-07-23 05:51:58,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408894496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:58,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:58,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:51:58,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994955641] [2022-07-23 05:51:58,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:58,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:51:58,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:51:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:51:58,845 INFO L87 Difference]: Start difference. First operand 576 states and 766 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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) [2022-07-23 05:51:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:58,963 INFO L93 Difference]: Finished difference Result 865 states and 1118 transitions. [2022-07-23 05:51:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:51:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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 [2022-07-23 05:51:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:58,966 INFO L225 Difference]: With dead ends: 865 [2022-07-23 05:51:58,966 INFO L226 Difference]: Without dead ends: 865 [2022-07-23 05:51:58,966 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 [2022-07-23 05:51:58,966 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 299 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:58,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 529 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:51:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-07-23 05:51:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 459. [2022-07-23 05:51:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 389 states have (on average 1.455012853470437) internal successors, (566), 440 states have internal predecessors, (566), 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) [2022-07-23 05:51:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 596 transitions. [2022-07-23 05:51:58,974 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 596 transitions. Word has length 28 [2022-07-23 05:51:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:58,975 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 596 transitions. [2022-07-23 05:51:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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) [2022-07-23 05:51:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 596 transitions. [2022-07-23 05:51:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:51:58,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:58,975 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] [2022-07-23 05:51:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-23 05:51:58,976 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash -933658936, now seen corresponding path program 1 times [2022-07-23 05:51:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:58,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626851591] [2022-07-23 05:51:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:59,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626851591] [2022-07-23 05:51:59,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626851591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:59,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:59,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675190386] [2022-07-23 05:51:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:59,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:51:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:51:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:51:59,014 INFO L87 Difference]: Start difference. First operand 459 states and 596 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-07-23 05:51:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:59,047 INFO L93 Difference]: Finished difference Result 929 states and 1212 transitions. [2022-07-23 05:51:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:51:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 [2022-07-23 05:51:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:59,050 INFO L225 Difference]: With dead ends: 929 [2022-07-23 05:51:59,050 INFO L226 Difference]: Without dead ends: 929 [2022-07-23 05:51:59,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:59,050 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 232 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:59,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 934 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-07-23 05:51:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 534. [2022-07-23 05:51:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 464 states have (on average 1.4504310344827587) internal successors, (673), 510 states have internal predecessors, (673), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-23 05:51:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 703 transitions. [2022-07-23 05:51:59,059 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 703 transitions. Word has length 30 [2022-07-23 05:51:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:59,059 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 703 transitions. [2022-07-23 05:51:59,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-07-23 05:51:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 703 transitions. [2022-07-23 05:51:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:51:59,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:59,060 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] [2022-07-23 05:51:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-23 05:51:59,060 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash -933657014, now seen corresponding path program 1 times [2022-07-23 05:51:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:59,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408773810] [2022-07-23 05:51:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:59,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:59,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408773810] [2022-07-23 05:51:59,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408773810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:59,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:59,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:51:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401844795] [2022-07-23 05:51:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:51:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:51:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:51:59,117 INFO L87 Difference]: Start difference. First operand 534 states and 703 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-07-23 05:51:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:59,338 INFO L93 Difference]: Finished difference Result 1132 states and 1464 transitions. [2022-07-23 05:51:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:51:59,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) 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 [2022-07-23 05:51:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:59,342 INFO L225 Difference]: With dead ends: 1132 [2022-07-23 05:51:59,342 INFO L226 Difference]: Without dead ends: 1132 [2022-07-23 05:51:59,342 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 [2022-07-23 05:51:59,342 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 501 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:59,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1630 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-07-23 05:51:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 552. [2022-07-23 05:51:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 482 states have (on average 1.450207468879668) internal successors, (699), 528 states have internal predecessors, (699), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-23 05:51:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 729 transitions. [2022-07-23 05:51:59,351 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 729 transitions. Word has length 30 [2022-07-23 05:51:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:59,351 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 729 transitions. [2022-07-23 05:51:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-07-23 05:51:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 729 transitions. [2022-07-23 05:51:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:51:59,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:59,352 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] [2022-07-23 05:51:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-23 05:51:59,352 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1615988093, now seen corresponding path program 1 times [2022-07-23 05:51:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:59,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949500917] [2022-07-23 05:51:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:59,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:59,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949500917] [2022-07-23 05:51:59,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949500917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:59,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:59,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89538316] [2022-07-23 05:51:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:59,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:51:59,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:51:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:59,443 INFO L87 Difference]: Start difference. First operand 552 states and 729 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) [2022-07-23 05:51:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:59,840 INFO L93 Difference]: Finished difference Result 1036 states and 1327 transitions. [2022-07-23 05:51:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:51:59,841 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 [2022-07-23 05:51:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:59,843 INFO L225 Difference]: With dead ends: 1036 [2022-07-23 05:51:59,844 INFO L226 Difference]: Without dead ends: 1036 [2022-07-23 05:51:59,844 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 [2022-07-23 05:51:59,844 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 461 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:59,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 994 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:51:59,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-07-23 05:51:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 592. [2022-07-23 05:51:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 518 states have (on average 1.4343629343629343) internal successors, (743), 565 states have internal predecessors, (743), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:51:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 779 transitions. [2022-07-23 05:51:59,853 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 779 transitions. Word has length 30 [2022-07-23 05:51:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:59,853 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 779 transitions. [2022-07-23 05:51:59,853 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) [2022-07-23 05:51:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 779 transitions. [2022-07-23 05:51:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:51:59,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:59,853 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] [2022-07-23 05:51:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-23 05:51:59,853 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1342481239, now seen corresponding path program 1 times [2022-07-23 05:51:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:59,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213757268] [2022-07-23 05:51:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213757268] [2022-07-23 05:51:59,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213757268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:59,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:59,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:51:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596901166] [2022-07-23 05:51:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:59,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:51:59,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:51:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:51:59,891 INFO L87 Difference]: Start difference. First operand 592 states and 779 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-07-23 05:51:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:59,919 INFO L93 Difference]: Finished difference Result 952 states and 1240 transitions. [2022-07-23 05:51:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:51:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 [2022-07-23 05:51:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:59,922 INFO L225 Difference]: With dead ends: 952 [2022-07-23 05:51:59,922 INFO L226 Difference]: Without dead ends: 952 [2022-07-23 05:51:59,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:51:59,922 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 211 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:59,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1077 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-07-23 05:51:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 588. [2022-07-23 05:51:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 514 states have (on average 1.433852140077821) internal successors, (737), 561 states have internal predecessors, (737), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:51:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 773 transitions. [2022-07-23 05:51:59,930 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 773 transitions. Word has length 30 [2022-07-23 05:51:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:59,931 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 773 transitions. [2022-07-23 05:51:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-07-23 05:51:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 773 transitions. [2022-07-23 05:51:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:51:59,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:59,931 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] [2022-07-23 05:51:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-23 05:51:59,932 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:51:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1340636119, now seen corresponding path program 1 times [2022-07-23 05:51:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:59,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606269502] [2022-07-23 05:51:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:51:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:51:59,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:59,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606269502] [2022-07-23 05:51:59,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606269502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:59,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:59,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:51:59,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478218025] [2022-07-23 05:51:59,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:59,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:51:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:51:59,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:51:59,988 INFO L87 Difference]: Start difference. First operand 588 states and 773 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-07-23 05:52:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:00,203 INFO L93 Difference]: Finished difference Result 1169 states and 1513 transitions. [2022-07-23 05:52:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:52:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) 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 [2022-07-23 05:52:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:00,206 INFO L225 Difference]: With dead ends: 1169 [2022-07-23 05:52:00,206 INFO L226 Difference]: Without dead ends: 1169 [2022-07-23 05:52:00,207 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 [2022-07-23 05:52:00,207 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 477 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:00,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1742 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:52:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-07-23 05:52:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 572. [2022-07-23 05:52:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 500 states have (on average 1.414) internal successors, (707), 545 states have internal predecessors, (707), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 743 transitions. [2022-07-23 05:52:00,216 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 743 transitions. Word has length 30 [2022-07-23 05:52:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:00,217 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 743 transitions. [2022-07-23 05:52:00,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-07-23 05:52:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 743 transitions. [2022-07-23 05:52:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:52:00,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:00,217 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] [2022-07-23 05:52:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-23 05:52:00,218 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:00,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1443976913, now seen corresponding path program 1 times [2022-07-23 05:52:00,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:00,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538850481] [2022-07-23 05:52:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:00,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:00,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:52:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:00,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:00,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538850481] [2022-07-23 05:52:00,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538850481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:00,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:00,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:52:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279659487] [2022-07-23 05:52:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:52:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:52:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:52:00,332 INFO L87 Difference]: Start difference. First operand 572 states and 743 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) [2022-07-23 05:52:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:00,653 INFO L93 Difference]: Finished difference Result 953 states and 1201 transitions. [2022-07-23 05:52:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:52:00,653 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 [2022-07-23 05:52:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:00,656 INFO L225 Difference]: With dead ends: 953 [2022-07-23 05:52:00,656 INFO L226 Difference]: Without dead ends: 953 [2022-07-23 05:52:00,656 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 [2022-07-23 05:52:00,656 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 742 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:00,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 603 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:52:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-07-23 05:52:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 571. [2022-07-23 05:52:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 500 states have (on average 1.406) internal successors, (703), 544 states have internal predecessors, (703), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 739 transitions. [2022-07-23 05:52:00,664 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 739 transitions. Word has length 31 [2022-07-23 05:52:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:00,665 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 739 transitions. [2022-07-23 05:52:00,665 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) [2022-07-23 05:52:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 739 transitions. [2022-07-23 05:52:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 05:52:00,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:00,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:00,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-23 05:52:00,666 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:00,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash 403780234, now seen corresponding path program 1 times [2022-07-23 05:52:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:00,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806542434] [2022-07-23 05:52:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:00,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:00,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:52:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:00,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:00,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806542434] [2022-07-23 05:52:00,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806542434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:00,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:00,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:52:00,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63485540] [2022-07-23 05:52:00,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:00,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:52:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:52:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:52:00,782 INFO L87 Difference]: Start difference. First operand 571 states and 739 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2022-07-23 05:52:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:00,930 INFO L93 Difference]: Finished difference Result 618 states and 786 transitions. [2022-07-23 05:52:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:52:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 32 [2022-07-23 05:52:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:00,932 INFO L225 Difference]: With dead ends: 618 [2022-07-23 05:52:00,932 INFO L226 Difference]: Without dead ends: 618 [2022-07-23 05:52:00,932 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 [2022-07-23 05:52:00,932 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 106 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:00,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 794 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:52:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-23 05:52:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 550. [2022-07-23 05:52:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 479 states have (on average 1.4112734864300627) internal successors, (676), 525 states have internal predecessors, (676), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 712 transitions. [2022-07-23 05:52:00,939 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 712 transitions. Word has length 32 [2022-07-23 05:52:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:00,939 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 712 transitions. [2022-07-23 05:52:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2022-07-23 05:52:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 712 transitions. [2022-07-23 05:52:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:52:00,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:00,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-23 05:52:00,940 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 407119085, now seen corresponding path program 1 times [2022-07-23 05:52:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:00,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076218451] [2022-07-23 05:52:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:00,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:00,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:00,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076218451] [2022-07-23 05:52:00,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076218451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:00,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:00,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:52:00,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618843482] [2022-07-23 05:52:00,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:00,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:52:00,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:00,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:52:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:52:00,987 INFO L87 Difference]: Start difference. First operand 550 states and 712 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-07-23 05:52:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:01,087 INFO L93 Difference]: Finished difference Result 669 states and 856 transitions. [2022-07-23 05:52:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:52:01,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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 33 [2022-07-23 05:52:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:01,090 INFO L225 Difference]: With dead ends: 669 [2022-07-23 05:52:01,090 INFO L226 Difference]: Without dead ends: 669 [2022-07-23 05:52:01,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:52:01,090 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 354 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:01,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 508 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:52:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-23 05:52:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 549. [2022-07-23 05:52:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 479 states have (on average 1.407098121085595) internal successors, (674), 524 states have internal predecessors, (674), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 710 transitions. [2022-07-23 05:52:01,097 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 710 transitions. Word has length 33 [2022-07-23 05:52:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:01,097 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 710 transitions. [2022-07-23 05:52:01,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-07-23 05:52:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 710 transitions. [2022-07-23 05:52:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:52:01,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:01,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-23 05:52:01,098 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash 407119084, now seen corresponding path program 1 times [2022-07-23 05:52:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591736834] [2022-07-23 05:52:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:01,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:01,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591736834] [2022-07-23 05:52:01,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591736834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:01,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:01,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:52:01,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420766195] [2022-07-23 05:52:01,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:01,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:52:01,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:01,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:52:01,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:52:01,124 INFO L87 Difference]: Start difference. First operand 549 states and 710 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-07-23 05:52:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:01,260 INFO L93 Difference]: Finished difference Result 663 states and 848 transitions. [2022-07-23 05:52:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:52:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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 33 [2022-07-23 05:52:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:01,262 INFO L225 Difference]: With dead ends: 663 [2022-07-23 05:52:01,262 INFO L226 Difference]: Without dead ends: 663 [2022-07-23 05:52:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:52:01,262 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 333 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:01,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 438 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:52:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-07-23 05:52:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 548. [2022-07-23 05:52:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4029227557411275) internal successors, (672), 523 states have internal predecessors, (672), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 708 transitions. [2022-07-23 05:52:01,269 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 708 transitions. Word has length 33 [2022-07-23 05:52:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:01,269 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 708 transitions. [2022-07-23 05:52:01,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-07-23 05:52:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 708 transitions. [2022-07-23 05:52:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:52:01,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:01,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:01,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-23 05:52:01,270 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash 399419021, now seen corresponding path program 1 times [2022-07-23 05:52:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:01,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918511244] [2022-07-23 05:52:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:01,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:01,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:01,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918511244] [2022-07-23 05:52:01,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918511244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:01,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:01,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:52:01,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707204507] [2022-07-23 05:52:01,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:01,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:52:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:52:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:52:01,300 INFO L87 Difference]: Start difference. First operand 548 states and 708 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-07-23 05:52:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:01,463 INFO L93 Difference]: Finished difference Result 951 states and 1194 transitions. [2022-07-23 05:52:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:52:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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 35 [2022-07-23 05:52:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:01,466 INFO L225 Difference]: With dead ends: 951 [2022-07-23 05:52:01,466 INFO L226 Difference]: Without dead ends: 951 [2022-07-23 05:52:01,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:52:01,466 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 423 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:01,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 599 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:52:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-07-23 05:52:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 545. [2022-07-23 05:52:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 479 states have (on average 1.3903966597077244) internal successors, (666), 520 states have internal predecessors, (666), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 702 transitions. [2022-07-23 05:52:01,474 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 702 transitions. Word has length 35 [2022-07-23 05:52:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:01,474 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 702 transitions. [2022-07-23 05:52:01,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-07-23 05:52:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 702 transitions. [2022-07-23 05:52:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:52:01,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:01,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:01,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-23 05:52:01,475 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 399419022, now seen corresponding path program 1 times [2022-07-23 05:52:01,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:01,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222161292] [2022-07-23 05:52:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:01,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:01,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:01,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222161292] [2022-07-23 05:52:01,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222161292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:01,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:01,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:52:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762784571] [2022-07-23 05:52:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:52:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:52:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:52:01,538 INFO L87 Difference]: Start difference. First operand 545 states and 702 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2022-07-23 05:52:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:01,692 INFO L93 Difference]: Finished difference Result 855 states and 1077 transitions. [2022-07-23 05:52:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:52:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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 35 [2022-07-23 05:52:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:01,694 INFO L225 Difference]: With dead ends: 855 [2022-07-23 05:52:01,694 INFO L226 Difference]: Without dead ends: 855 [2022-07-23 05:52:01,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:52:01,695 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 718 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:01,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 604 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:52:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-23 05:52:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 544. [2022-07-23 05:52:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 479 states have (on average 1.3862212943632568) internal successors, (664), 519 states have internal predecessors, (664), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 700 transitions. [2022-07-23 05:52:01,702 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 700 transitions. Word has length 35 [2022-07-23 05:52:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:01,702 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 700 transitions. [2022-07-23 05:52:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2022-07-23 05:52:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 700 transitions. [2022-07-23 05:52:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:52:01,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:01,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:01,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-23 05:52:01,703 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 399419183, now seen corresponding path program 1 times [2022-07-23 05:52:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632060738] [2022-07-23 05:52:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:01,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:01,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632060738] [2022-07-23 05:52:01,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632060738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:01,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:01,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:52:01,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934706232] [2022-07-23 05:52:01,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:01,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:52:01,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:52:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:52:01,755 INFO L87 Difference]: Start difference. First operand 544 states and 700 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-07-23 05:52:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:01,832 INFO L93 Difference]: Finished difference Result 662 states and 842 transitions. [2022-07-23 05:52:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:52:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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 35 [2022-07-23 05:52:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:01,834 INFO L225 Difference]: With dead ends: 662 [2022-07-23 05:52:01,835 INFO L226 Difference]: Without dead ends: 662 [2022-07-23 05:52:01,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:52:01,835 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 298 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:01,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 259 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:52:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-07-23 05:52:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 542. [2022-07-23 05:52:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 479 states have (on average 1.3778705636743216) internal successors, (660), 517 states have internal predecessors, (660), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-23 05:52:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 696 transitions. [2022-07-23 05:52:01,842 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 696 transitions. Word has length 35 [2022-07-23 05:52:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:01,842 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 696 transitions. [2022-07-23 05:52:01,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-07-23 05:52:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 696 transitions. [2022-07-23 05:52:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 05:52:01,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:01,843 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] [2022-07-23 05:52:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-23 05:52:01,844 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:01,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1620073746, now seen corresponding path program 1 times [2022-07-23 05:52:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:01,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730254936] [2022-07-23 05:52:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:52:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-23 05:52:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:52:01,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:01,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730254936] [2022-07-23 05:52:01,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730254936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:01,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760463385] [2022-07-23 05:52:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:01,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:01,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:01,909 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) [2022-07-23 05:52:01,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:52:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:02,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:52:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:02,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:02,238 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:52:02,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:52:02,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760463385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:52:02,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:52:02,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-23 05:52:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117466215] [2022-07-23 05:52:02,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:02,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:52:02,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:52:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:52:02,287 INFO L87 Difference]: Start difference. First operand 542 states and 696 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) [2022-07-23 05:52:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:02,806 INFO L93 Difference]: Finished difference Result 1745 states and 2122 transitions. [2022-07-23 05:52:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:52:02,806 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 [2022-07-23 05:52:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:02,810 INFO L225 Difference]: With dead ends: 1745 [2022-07-23 05:52:02,810 INFO L226 Difference]: Without dead ends: 1745 [2022-07-23 05:52:02,810 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 [2022-07-23 05:52:02,810 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 2634 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:02,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2636 Valid, 1299 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:52:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-07-23 05:52:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 664. [2022-07-23 05:52:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 599 states have (on average 1.332220367278798) internal successors, (798), 631 states have internal predecessors, (798), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-23 05:52:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 846 transitions. [2022-07-23 05:52:02,827 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 846 transitions. Word has length 43 [2022-07-23 05:52:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:02,828 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 846 transitions. [2022-07-23 05:52:02,828 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) [2022-07-23 05:52:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 846 transitions. [2022-07-23 05:52:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 05:52:02,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:02,829 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] [2022-07-23 05:52:02,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:52:03,046 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,SelfDestructingSolverStorable42 [2022-07-23 05:52:03,047 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1803853866, now seen corresponding path program 1 times [2022-07-23 05:52:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:03,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443909798] [2022-07-23 05:52:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 05:52:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:03,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443909798] [2022-07-23 05:52:03,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443909798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838011464] [2022-07-23 05:52:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:03,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:03,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:03,106 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) [2022-07-23 05:52:03,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:52:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:03,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:52:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:03,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:52:03,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:03,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:52:03,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:52:03,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:52:03,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838011464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:03,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:52:03,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-07-23 05:52:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037339718] [2022-07-23 05:52:03,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:03,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:52:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:52:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:52:03,345 INFO L87 Difference]: Start difference. First operand 664 states and 846 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) [2022-07-23 05:52:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:03,580 INFO L93 Difference]: Finished difference Result 634 states and 793 transitions. [2022-07-23 05:52:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:52:03,580 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 45 [2022-07-23 05:52:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:03,582 INFO L225 Difference]: With dead ends: 634 [2022-07-23 05:52:03,582 INFO L226 Difference]: Without dead ends: 634 [2022-07-23 05:52:03,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:52:03,582 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 280 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:03,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1358 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:52:03,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-07-23 05:52:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2022-07-23 05:52:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 427 states have (on average 1.3536299765807962) internal successors, (578), 456 states have internal predecessors, (578), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:52:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 602 transitions. [2022-07-23 05:52:03,591 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 602 transitions. Word has length 45 [2022-07-23 05:52:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:03,591 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 602 transitions. [2022-07-23 05:52:03,591 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) [2022-07-23 05:52:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 602 transitions. [2022-07-23 05:52:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-23 05:52:03,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:03,596 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, 1] [2022-07-23 05:52:03,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-23 05:52:03,814 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,SelfDestructingSolverStorable43 [2022-07-23 05:52:03,814 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1377360706, now seen corresponding path program 1 times [2022-07-23 05:52:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:03,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350234597] [2022-07-23 05:52:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:03,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:04,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:04,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350234597] [2022-07-23 05:52:04,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350234597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:04,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:04,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:52:04,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541224465] [2022-07-23 05:52:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:04,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:52:04,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:04,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:52:04,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:52:04,334 INFO L87 Difference]: Start difference. First operand 476 states and 602 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-07-23 05:52:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:04,816 INFO L93 Difference]: Finished difference Result 674 states and 844 transitions. [2022-07-23 05:52:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:52:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 49 [2022-07-23 05:52:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:04,818 INFO L225 Difference]: With dead ends: 674 [2022-07-23 05:52:04,818 INFO L226 Difference]: Without dead ends: 674 [2022-07-23 05:52:04,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:52:04,818 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 224 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:04,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1365 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:52:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-23 05:52:04,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 498. [2022-07-23 05:52:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 449 states have (on average 1.3385300668151447) internal successors, (601), 478 states have internal predecessors, (601), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:52:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 625 transitions. [2022-07-23 05:52:04,825 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 625 transitions. Word has length 49 [2022-07-23 05:52:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:04,825 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 625 transitions. [2022-07-23 05:52:04,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-07-23 05:52:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 625 transitions. [2022-07-23 05:52:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:52:04,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:04,826 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, 1, 1] [2022-07-23 05:52:04,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-23 05:52:04,827 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash 399799259, now seen corresponding path program 1 times [2022-07-23 05:52:04,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:04,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425985106] [2022-07-23 05:52:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:04,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:04,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:04,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425985106] [2022-07-23 05:52:04,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425985106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:04,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:04,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:52:04,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030050109] [2022-07-23 05:52:04,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:52:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:52:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:52:04,960 INFO L87 Difference]: Start difference. First operand 498 states and 625 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 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) [2022-07-23 05:52:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:05,346 INFO L93 Difference]: Finished difference Result 962 states and 1198 transitions. [2022-07-23 05:52:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:52:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 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 50 [2022-07-23 05:52:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:05,348 INFO L225 Difference]: With dead ends: 962 [2022-07-23 05:52:05,348 INFO L226 Difference]: Without dead ends: 962 [2022-07-23 05:52:05,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:52:05,349 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 857 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:05,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 986 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:52:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-07-23 05:52:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 608. [2022-07-23 05:52:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 548 states have (on average 1.332116788321168) internal successors, (730), 579 states have internal predecessors, (730), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-23 05:52:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 772 transitions. [2022-07-23 05:52:05,357 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 772 transitions. Word has length 50 [2022-07-23 05:52:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:05,357 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 772 transitions. [2022-07-23 05:52:05,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 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) [2022-07-23 05:52:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 772 transitions. [2022-07-23 05:52:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:52:05,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:05,358 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, 1, 1] [2022-07-23 05:52:05,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-23 05:52:05,359 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:05,359 INFO L85 PathProgramCache]: Analyzing trace with hash 399799260, now seen corresponding path program 1 times [2022-07-23 05:52:05,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:05,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861611543] [2022-07-23 05:52:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:05,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:05,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:05,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861611543] [2022-07-23 05:52:05,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861611543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:05,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:05,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:52:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548728755] [2022-07-23 05:52:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:05,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:52:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:52:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:52:05,551 INFO L87 Difference]: Start difference. First operand 608 states and 772 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 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) [2022-07-23 05:52:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:05,910 INFO L93 Difference]: Finished difference Result 928 states and 1162 transitions. [2022-07-23 05:52:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:52:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 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 50 [2022-07-23 05:52:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:05,912 INFO L225 Difference]: With dead ends: 928 [2022-07-23 05:52:05,912 INFO L226 Difference]: Without dead ends: 928 [2022-07-23 05:52:05,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:52:05,913 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 966 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:05,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 737 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:52:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-07-23 05:52:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 707. [2022-07-23 05:52:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 639 states have (on average 1.3364632237871674) internal successors, (854), 672 states have internal predecessors, (854), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-23 05:52:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 908 transitions. [2022-07-23 05:52:05,922 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 908 transitions. Word has length 50 [2022-07-23 05:52:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:05,922 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 908 transitions. [2022-07-23 05:52:05,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 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) [2022-07-23 05:52:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 908 transitions. [2022-07-23 05:52:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:52:05,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:05,923 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, 1, 1] [2022-07-23 05:52:05,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-23 05:52:05,923 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:05,923 INFO L85 PathProgramCache]: Analyzing trace with hash 397952217, now seen corresponding path program 1 times [2022-07-23 05:52:05,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:05,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994182750] [2022-07-23 05:52:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:05,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:06,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:06,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994182750] [2022-07-23 05:52:06,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994182750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514057084] [2022-07-23 05:52:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:06,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:06,139 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) [2022-07-23 05:52:06,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:52:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-23 05:52:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:06,310 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:52:06,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:06,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:06,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:06,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-23 05:52:06,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-23 05:52:06,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-07-23 05:52:06,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-07-23 05:52:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:06,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:52:06,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514057084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:06,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:52:06,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2022-07-23 05:52:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661582939] [2022-07-23 05:52:06,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:06,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:52:06,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:52:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:52:06,581 INFO L87 Difference]: Start difference. First operand 707 states and 908 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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) [2022-07-23 05:52:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:07,067 INFO L93 Difference]: Finished difference Result 1592 states and 2006 transitions. [2022-07-23 05:52:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:52:07,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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 50 [2022-07-23 05:52:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:07,070 INFO L225 Difference]: With dead ends: 1592 [2022-07-23 05:52:07,070 INFO L226 Difference]: Without dead ends: 1592 [2022-07-23 05:52:07,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:52:07,070 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 718 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:07,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1415 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:52:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-07-23 05:52:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 737. [2022-07-23 05:52:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 669 states have (on average 1.3288490284005978) internal successors, (889), 702 states have internal predecessors, (889), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-23 05:52:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 943 transitions. [2022-07-23 05:52:07,083 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 943 transitions. Word has length 50 [2022-07-23 05:52:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:07,083 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 943 transitions. [2022-07-23 05:52:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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) [2022-07-23 05:52:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 943 transitions. [2022-07-23 05:52:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:52:07,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:07,084 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, 1, 1] [2022-07-23 05:52:07,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-23 05:52:07,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:07,300 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782164, now seen corresponding path program 1 times [2022-07-23 05:52:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:07,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015980021] [2022-07-23 05:52:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:07,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:07,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:07,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015980021] [2022-07-23 05:52:07,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015980021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:07,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:07,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-23 05:52:07,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934913885] [2022-07-23 05:52:07,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:07,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:52:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:52:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:52:07,503 INFO L87 Difference]: Start difference. First operand 737 states and 943 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2022-07-23 05:52:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:08,449 INFO L93 Difference]: Finished difference Result 1847 states and 2361 transitions. [2022-07-23 05:52:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 05:52:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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 50 [2022-07-23 05:52:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:08,452 INFO L225 Difference]: With dead ends: 1847 [2022-07-23 05:52:08,452 INFO L226 Difference]: Without dead ends: 1847 [2022-07-23 05:52:08,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:52:08,453 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 842 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:08,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 2187 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:52:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-07-23 05:52:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 940. [2022-07-23 05:52:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 860 states have (on average 1.3325581395348838) internal successors, (1146), 896 states have internal predecessors, (1146), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 31 states have call predecessors, (48), 24 states have call successors, (48) [2022-07-23 05:52:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1218 transitions. [2022-07-23 05:52:08,470 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1218 transitions. Word has length 50 [2022-07-23 05:52:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:08,470 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1218 transitions. [2022-07-23 05:52:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2022-07-23 05:52:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1218 transitions. [2022-07-23 05:52:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:52:08,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:08,471 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, 1, 1] [2022-07-23 05:52:08,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-23 05:52:08,471 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:08,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782165, now seen corresponding path program 1 times [2022-07-23 05:52:08,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481979293] [2022-07-23 05:52:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:08,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:08,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:08,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:08,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481979293] [2022-07-23 05:52:08,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481979293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:08,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:08,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:52:08,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585819463] [2022-07-23 05:52:08,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:08,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:52:08,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:52:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:52:08,683 INFO L87 Difference]: Start difference. First operand 940 states and 1218 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 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) [2022-07-23 05:52:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:09,253 INFO L93 Difference]: Finished difference Result 1869 states and 2407 transitions. [2022-07-23 05:52:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:52:09,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 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 50 [2022-07-23 05:52:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:09,256 INFO L225 Difference]: With dead ends: 1869 [2022-07-23 05:52:09,256 INFO L226 Difference]: Without dead ends: 1869 [2022-07-23 05:52:09,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:52:09,259 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 625 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:09,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1951 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:52:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-07-23 05:52:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 829. [2022-07-23 05:52:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 761 states have (on average 1.3350854139290407) internal successors, (1016), 794 states have internal predecessors, (1016), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-23 05:52:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1070 transitions. [2022-07-23 05:52:09,275 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1070 transitions. Word has length 50 [2022-07-23 05:52:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:09,275 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1070 transitions. [2022-07-23 05:52:09,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 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) [2022-07-23 05:52:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1070 transitions. [2022-07-23 05:52:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:52:09,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:09,276 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, 1, 1] [2022-07-23 05:52:09,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-23 05:52:09,276 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:09,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1777935122, now seen corresponding path program 1 times [2022-07-23 05:52:09,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:09,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356663710] [2022-07-23 05:52:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:09,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:09,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356663710] [2022-07-23 05:52:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356663710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:09,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:09,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-23 05:52:09,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333648859] [2022-07-23 05:52:09,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:52:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:52:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:52:09,474 INFO L87 Difference]: Start difference. First operand 829 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2022-07-23 05:52:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:10,135 INFO L93 Difference]: Finished difference Result 1629 states and 2052 transitions. [2022-07-23 05:52:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:52:10,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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 50 [2022-07-23 05:52:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:10,137 INFO L225 Difference]: With dead ends: 1629 [2022-07-23 05:52:10,137 INFO L226 Difference]: Without dead ends: 1629 [2022-07-23 05:52:10,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:52:10,138 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 634 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:10,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 2004 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:52:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-07-23 05:52:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 834. [2022-07-23 05:52:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 766 states have (on average 1.3328981723237598) internal successors, (1021), 799 states have internal predecessors, (1021), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-23 05:52:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1075 transitions. [2022-07-23 05:52:10,151 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1075 transitions. Word has length 50 [2022-07-23 05:52:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:10,151 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1075 transitions. [2022-07-23 05:52:10,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2022-07-23 05:52:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1075 transitions. [2022-07-23 05:52:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:52:10,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:10,152 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, 1, 1, 1] [2022-07-23 05:52:10,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-23 05:52:10,152 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732840, now seen corresponding path program 1 times [2022-07-23 05:52:10,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:10,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484702205] [2022-07-23 05:52:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:10,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:10,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:10,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:10,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484702205] [2022-07-23 05:52:10,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484702205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:10,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866982787] [2022-07-23 05:52:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:10,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:10,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:10,452 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) [2022-07-23 05:52:10,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:52:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:52:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:10,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:10,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:10,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:10,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:10,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:10,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:52:10,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866982787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:10,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:52:10,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2022-07-23 05:52:10,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337416967] [2022-07-23 05:52:10,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:10,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:52:10,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:52:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:52:10,920 INFO L87 Difference]: Start difference. First operand 834 states and 1075 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2022-07-23 05:52:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:11,348 INFO L93 Difference]: Finished difference Result 1525 states and 1952 transitions. [2022-07-23 05:52:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:52:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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 51 [2022-07-23 05:52:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:11,350 INFO L225 Difference]: With dead ends: 1525 [2022-07-23 05:52:11,350 INFO L226 Difference]: Without dead ends: 1525 [2022-07-23 05:52:11,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:52:11,351 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 867 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:11,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 882 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:52:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-07-23 05:52:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1066. [2022-07-23 05:52:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 974 states have (on average 1.3285420944558521) internal successors, (1294), 1013 states have internal predecessors, (1294), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 37 states have call predecessors, (60), 30 states have call successors, (60) [2022-07-23 05:52:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1384 transitions. [2022-07-23 05:52:11,364 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1384 transitions. Word has length 51 [2022-07-23 05:52:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:11,365 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1384 transitions. [2022-07-23 05:52:11,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2022-07-23 05:52:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1384 transitions. [2022-07-23 05:52:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:52:11,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:11,365 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, 1, 1, 1] [2022-07-23 05:52:11,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:52:11,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:11,583 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732841, now seen corresponding path program 1 times [2022-07-23 05:52:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:11,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478396392] [2022-07-23 05:52:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:11,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:11,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:11,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478396392] [2022-07-23 05:52:11,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478396392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:11,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:11,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-23 05:52:11,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017933390] [2022-07-23 05:52:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:11,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:52:11,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:52:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:52:11,986 INFO L87 Difference]: Start difference. First operand 1066 states and 1384 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-07-23 05:52:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:13,037 INFO L93 Difference]: Finished difference Result 2540 states and 3330 transitions. [2022-07-23 05:52:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:52:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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 51 [2022-07-23 05:52:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:13,041 INFO L225 Difference]: With dead ends: 2540 [2022-07-23 05:52:13,041 INFO L226 Difference]: Without dead ends: 2540 [2022-07-23 05:52:13,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:52:13,043 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1561 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:13,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1563 Valid, 1299 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:52:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-07-23 05:52:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1245. [2022-07-23 05:52:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1137 states have (on average 1.3333333333333333) internal successors, (1516), 1180 states have internal predecessors, (1516), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 45 states have call predecessors, (76), 38 states have call successors, (76) [2022-07-23 05:52:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1630 transitions. [2022-07-23 05:52:13,063 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1630 transitions. Word has length 51 [2022-07-23 05:52:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:13,063 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1630 transitions. [2022-07-23 05:52:13,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-07-23 05:52:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1630 transitions. [2022-07-23 05:52:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:52:13,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:13,064 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, 1, 1, 1, 1] [2022-07-23 05:52:13,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-23 05:52:13,064 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2066269430, now seen corresponding path program 1 times [2022-07-23 05:52:13,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:13,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556945513] [2022-07-23 05:52:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:13,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:13,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:13,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556945513] [2022-07-23 05:52:13,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556945513] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:13,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:13,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:52:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539052205] [2022-07-23 05:52:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:13,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:52:13,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:52:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:52:13,191 INFO L87 Difference]: Start difference. First operand 1245 states and 1630 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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) [2022-07-23 05:52:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:13,431 INFO L93 Difference]: Finished difference Result 1943 states and 2525 transitions. [2022-07-23 05:52:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:52:13,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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 52 [2022-07-23 05:52:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:13,434 INFO L225 Difference]: With dead ends: 1943 [2022-07-23 05:52:13,434 INFO L226 Difference]: Without dead ends: 1943 [2022-07-23 05:52:13,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:52:13,435 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 938 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:13,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 909 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:52:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2022-07-23 05:52:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1649. [2022-07-23 05:52:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2022-07-23 05:52:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2022-07-23 05:52:13,455 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2022-07-23 05:52:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:13,455 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2022-07-23 05:52:13,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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) [2022-07-23 05:52:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2022-07-23 05:52:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:52:13,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:13,456 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, 1, 1, 1, 1] [2022-07-23 05:52:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-23 05:52:13,456 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2009011128, now seen corresponding path program 1 times [2022-07-23 05:52:13,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:13,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646975263] [2022-07-23 05:52:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:13,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:13,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646975263] [2022-07-23 05:52:13,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646975263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:13,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:13,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-23 05:52:13,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605531288] [2022-07-23 05:52:13,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:13,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:52:13,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:52:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:52:13,749 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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) [2022-07-23 05:52:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:14,734 INFO L93 Difference]: Finished difference Result 2946 states and 3872 transitions. [2022-07-23 05:52:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:52:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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 52 [2022-07-23 05:52:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:14,739 INFO L225 Difference]: With dead ends: 2946 [2022-07-23 05:52:14,740 INFO L226 Difference]: Without dead ends: 2946 [2022-07-23 05:52:14,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:52:14,741 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1511 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:14,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 1557 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:52:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-07-23 05:52:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1649. [2022-07-23 05:52:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2022-07-23 05:52:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2022-07-23 05:52:14,770 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2022-07-23 05:52:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:14,771 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2022-07-23 05:52:14,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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) [2022-07-23 05:52:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2022-07-23 05:52:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:52:14,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:14,771 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, 1, 1, 1, 1] [2022-07-23 05:52:14,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-23 05:52:14,772 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash 842252799, now seen corresponding path program 1 times [2022-07-23 05:52:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140098317] [2022-07-23 05:52:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:14,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:14,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:14,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140098317] [2022-07-23 05:52:14,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140098317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:14,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:14,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:52:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463475964] [2022-07-23 05:52:14,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:52:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:52:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:52:14,928 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2022-07-23 05:52:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:15,212 INFO L93 Difference]: Finished difference Result 2035 states and 2650 transitions. [2022-07-23 05:52:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:52:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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 52 [2022-07-23 05:52:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:15,215 INFO L225 Difference]: With dead ends: 2035 [2022-07-23 05:52:15,215 INFO L226 Difference]: Without dead ends: 2035 [2022-07-23 05:52:15,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:52:15,215 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 300 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:15,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1157 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:52:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-07-23 05:52:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1341. [2022-07-23 05:52:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1225 states have (on average 1.3338775510204082) internal successors, (1634), 1270 states have internal predecessors, (1634), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 49 states have call predecessors, (84), 42 states have call successors, (84) [2022-07-23 05:52:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1760 transitions. [2022-07-23 05:52:15,236 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1760 transitions. Word has length 52 [2022-07-23 05:52:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:15,236 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 1760 transitions. [2022-07-23 05:52:15,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2022-07-23 05:52:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1760 transitions. [2022-07-23 05:52:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 05:52:15,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:15,237 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, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-23 05:52:15,237 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1411489050, now seen corresponding path program 1 times [2022-07-23 05:52:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:15,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115517712] [2022-07-23 05:52:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:15,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:15,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115517712] [2022-07-23 05:52:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115517712] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:15,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:15,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:52:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866253422] [2022-07-23 05:52:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:15,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:52:15,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:52:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:52:15,467 INFO L87 Difference]: Start difference. First operand 1341 states and 1760 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 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) [2022-07-23 05:52:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:16,007 INFO L93 Difference]: Finished difference Result 2139 states and 2791 transitions. [2022-07-23 05:52:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:52:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 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 54 [2022-07-23 05:52:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:16,010 INFO L225 Difference]: With dead ends: 2139 [2022-07-23 05:52:16,011 INFO L226 Difference]: Without dead ends: 2139 [2022-07-23 05:52:16,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:52:16,011 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 831 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:16,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 944 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:52:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2022-07-23 05:52:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1849. [2022-07-23 05:52:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2022-07-23 05:52:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2022-07-23 05:52:16,033 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2022-07-23 05:52:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:16,033 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2022-07-23 05:52:16,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 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) [2022-07-23 05:52:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2022-07-23 05:52:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 05:52:16,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:16,034 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, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:16,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-23 05:52:16,034 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2074131620, now seen corresponding path program 1 times [2022-07-23 05:52:16,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:16,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831772509] [2022-07-23 05:52:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:16,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:16,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:16,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831772509] [2022-07-23 05:52:16,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831772509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:16,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:16,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-23 05:52:16,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39831488] [2022-07-23 05:52:16,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:16,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:52:16,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:16,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:52:16,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:52:16,323 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-07-23 05:52:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:17,609 INFO L93 Difference]: Finished difference Result 3328 states and 4408 transitions. [2022-07-23 05:52:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-23 05:52:17,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 54 [2022-07-23 05:52:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:17,625 INFO L225 Difference]: With dead ends: 3328 [2022-07-23 05:52:17,625 INFO L226 Difference]: Without dead ends: 3328 [2022-07-23 05:52:17,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:52:17,626 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 1410 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:17,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 1512 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:52:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2022-07-23 05:52:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 1849. [2022-07-23 05:52:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2022-07-23 05:52:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2022-07-23 05:52:17,657 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2022-07-23 05:52:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:17,657 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2022-07-23 05:52:17,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-07-23 05:52:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2022-07-23 05:52:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 05:52:17,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:17,659 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, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:17,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-23 05:52:17,659 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1952545763, now seen corresponding path program 1 times [2022-07-23 05:52:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877365211] [2022-07-23 05:52:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:17,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877365211] [2022-07-23 05:52:17,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877365211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:17,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:17,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:52:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549912741] [2022-07-23 05:52:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:52:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:52:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:52:17,893 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2022-07-23 05:52:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:18,518 INFO L93 Difference]: Finished difference Result 2961 states and 3905 transitions. [2022-07-23 05:52:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:52:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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 54 [2022-07-23 05:52:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:18,523 INFO L225 Difference]: With dead ends: 2961 [2022-07-23 05:52:18,523 INFO L226 Difference]: Without dead ends: 2961 [2022-07-23 05:52:18,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:52:18,523 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 781 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:18,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 2155 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:52:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2022-07-23 05:52:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1821. [2022-07-23 05:52:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1657 states have (on average 1.3349426674713338) internal successors, (2212), 1714 states have internal predecessors, (2212), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2022-07-23 05:52:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2410 transitions. [2022-07-23 05:52:18,557 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2410 transitions. Word has length 54 [2022-07-23 05:52:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:18,557 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 2410 transitions. [2022-07-23 05:52:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2022-07-23 05:52:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2410 transitions. [2022-07-23 05:52:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:52:18,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:18,558 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:18,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-23 05:52:18,558 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1262088084, now seen corresponding path program 1 times [2022-07-23 05:52:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:18,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59403849] [2022-07-23 05:52:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:18,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-23 05:52:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:52:18,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:18,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59403849] [2022-07-23 05:52:18,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59403849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:52:18,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:52:18,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-23 05:52:18,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930067006] [2022-07-23 05:52:18,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:52:18,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:52:18,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:52:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:52:18,971 INFO L87 Difference]: Start difference. First operand 1821 states and 2410 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2022-07-23 05:52:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:20,043 INFO L93 Difference]: Finished difference Result 3722 states and 4937 transitions. [2022-07-23 05:52:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:52:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 56 [2022-07-23 05:52:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:20,053 INFO L225 Difference]: With dead ends: 3722 [2022-07-23 05:52:20,053 INFO L226 Difference]: Without dead ends: 3720 [2022-07-23 05:52:20,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=773, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:52:20,055 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 1548 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:20,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 2415 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:52:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2022-07-23 05:52:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 1782. [2022-07-23 05:52:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1622 states have (on average 1.3298397040690506) internal successors, (2157), 1678 states have internal predecessors, (2157), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 71 states have call predecessors, (128), 64 states have call successors, (128) [2022-07-23 05:52:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2349 transitions. [2022-07-23 05:52:20,080 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2349 transitions. Word has length 56 [2022-07-23 05:52:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:20,081 INFO L495 AbstractCegarLoop]: Abstraction has 1782 states and 2349 transitions. [2022-07-23 05:52:20,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2022-07-23 05:52:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2349 transitions. [2022-07-23 05:52:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:52:20,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:20,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2022-07-23 05:52:20,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-23 05:52:20,082 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash 829418521, now seen corresponding path program 1 times [2022-07-23 05:52:20,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:20,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102329603] [2022-07-23 05:52:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-23 05:52:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:52:20,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:20,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102329603] [2022-07-23 05:52:20,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102329603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:20,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571832524] [2022-07-23 05:52:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:20,442 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) [2022-07-23 05:52:20,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:52:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-23 05:52:20,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:20,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:20,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:20,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:20,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:20,960 INFO L356 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-07-23 05:52:20,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2022-07-23 05:52:21,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:21,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:21,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571832524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:21,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:52:21,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2022-07-23 05:52:21,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164172483] [2022-07-23 05:52:21,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:21,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 05:52:21,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 05:52:21,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:52:21,087 INFO L87 Difference]: Start difference. First operand 1782 states and 2349 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 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) [2022-07-23 05:52:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:22,032 INFO L93 Difference]: Finished difference Result 3018 states and 3950 transitions. [2022-07-23 05:52:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 05:52:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 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 56 [2022-07-23 05:52:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:22,038 INFO L225 Difference]: With dead ends: 3018 [2022-07-23 05:52:22,038 INFO L226 Difference]: Without dead ends: 3018 [2022-07-23 05:52:22,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 05:52:22,039 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2486 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:22,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2487 Valid, 1679 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:52:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2022-07-23 05:52:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 1812. [2022-07-23 05:52:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3286924939467313) internal successors, (2195), 1705 states have internal predecessors, (2195), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2022-07-23 05:52:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2387 transitions. [2022-07-23 05:52:22,067 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2387 transitions. Word has length 56 [2022-07-23 05:52:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:22,067 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2387 transitions. [2022-07-23 05:52:22,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 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) [2022-07-23 05:52:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2387 transitions. [2022-07-23 05:52:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:52:22,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:22,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2022-07-23 05:52:22,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-23 05:52:22,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:22,287 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash 829418522, now seen corresponding path program 1 times [2022-07-23 05:52:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:22,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865621217] [2022-07-23 05:52:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:22,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:22,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-23 05:52:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:52:22,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865621217] [2022-07-23 05:52:22,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865621217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986393837] [2022-07-23 05:52:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:22,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:22,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:22,772 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) [2022-07-23 05:52:22,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:52:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-23 05:52:22,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:22,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:23,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2022-07-23 05:52:23,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:23,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:23,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 48 [2022-07-23 05:52:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:23,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 46 [2022-07-23 05:52:23,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:23,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 [2022-07-23 05:52:23,585 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-23 05:52:23,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-07-23 05:52:23,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 22 [2022-07-23 05:52:23,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 19 [2022-07-23 05:52:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:23,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:23,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986393837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:23,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:52:23,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2022-07-23 05:52:23,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929503711] [2022-07-23 05:52:23,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:52:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:52:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:52:23,923 INFO L87 Difference]: Start difference. First operand 1812 states and 2387 transitions. Second operand has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 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) [2022-07-23 05:52:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:26,677 INFO L93 Difference]: Finished difference Result 3570 states and 4717 transitions. [2022-07-23 05:52:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-23 05:52:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 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 56 [2022-07-23 05:52:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:26,683 INFO L225 Difference]: With dead ends: 3570 [2022-07-23 05:52:26,683 INFO L226 Difference]: Without dead ends: 3570 [2022-07-23 05:52:26,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=666, Invalid=3116, Unknown=0, NotChecked=0, Total=3782 [2022-07-23 05:52:26,684 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 3871 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3872 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:26,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3872 Valid, 2671 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-23 05:52:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-07-23 05:52:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 1812. [2022-07-23 05:52:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3268765133171914) internal successors, (2192), 1705 states have internal predecessors, (2192), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2022-07-23 05:52:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2384 transitions. [2022-07-23 05:52:26,713 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2384 transitions. Word has length 56 [2022-07-23 05:52:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:26,713 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2384 transitions. [2022-07-23 05:52:26,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 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) [2022-07-23 05:52:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2384 transitions. [2022-07-23 05:52:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:52:26,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:26,714 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, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:26,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:52:26,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:26,928 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -997629707, now seen corresponding path program 1 times [2022-07-23 05:52:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336995327] [2022-07-23 05:52:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:27,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-23 05:52:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:52:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:27,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336995327] [2022-07-23 05:52:27,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336995327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:27,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415459189] [2022-07-23 05:52:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:27,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:27,443 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) [2022-07-23 05:52:27,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:52:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:27,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-23 05:52:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:27,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:27,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:28,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:28,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:28,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:28,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 64 [2022-07-23 05:52:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:28,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:28,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 104 treesize of output 98 [2022-07-23 05:52:28,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 104 treesize of output 98 [2022-07-23 05:52:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:52:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415459189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:52:28,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:52:28,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 45 [2022-07-23 05:52:28,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045150571] [2022-07-23 05:52:28,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:28,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-23 05:52:28,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-23 05:52:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 05:52:28,974 INFO L87 Difference]: Start difference. First operand 1812 states and 2384 transitions. Second operand has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 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) [2022-07-23 05:52:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:35,834 INFO L93 Difference]: Finished difference Result 7246 states and 9494 transitions. [2022-07-23 05:52:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-23 05:52:35,835 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 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 56 [2022-07-23 05:52:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:35,847 INFO L225 Difference]: With dead ends: 7246 [2022-07-23 05:52:35,847 INFO L226 Difference]: Without dead ends: 7244 [2022-07-23 05:52:35,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2201, Invalid=10231, Unknown=0, NotChecked=0, Total=12432 [2022-07-23 05:52:35,849 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 3650 mSDsluCounter, 18583 mSDsCounter, 0 mSdLazyCounter, 8021 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3650 SdHoareTripleChecker+Valid, 19340 SdHoareTripleChecker+Invalid, 8342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 8021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:35,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3650 Valid, 19340 Invalid, 8342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 8021 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-23 05:52:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7244 states. [2022-07-23 05:52:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7244 to 1771. [2022-07-23 05:52:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1615 states have (on average 1.3195046439628484) internal successors, (2131), 1667 states have internal predecessors, (2131), 62 states have call successors, (62), 31 states have call predecessors, (62), 62 states have return successors, (124), 72 states have call predecessors, (124), 62 states have call successors, (124) [2022-07-23 05:52:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2317 transitions. [2022-07-23 05:52:35,886 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2317 transitions. Word has length 56 [2022-07-23 05:52:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:35,886 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2317 transitions. [2022-07-23 05:52:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 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) [2022-07-23 05:52:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2317 transitions. [2022-07-23 05:52:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:52:35,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:35,887 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:35,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:52:36,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:36,105 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash -773789015, now seen corresponding path program 1 times [2022-07-23 05:52:36,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:36,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820843973] [2022-07-23 05:52:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:36,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:36,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:36,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-23 05:52:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:52:36,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:36,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820843973] [2022-07-23 05:52:36,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820843973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:36,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597991728] [2022-07-23 05:52:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:36,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:36,284 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) [2022-07-23 05:52:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:52:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-23 05:52:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:36,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:36,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:36,874 INFO L356 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2022-07-23 05:52:36,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-07-23 05:52:36,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:52:36,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:36,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:37,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597991728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:37,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:52:37,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-23 05:52:37,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329921175] [2022-07-23 05:52:37,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:37,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:52:37,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:52:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:52:37,030 INFO L87 Difference]: Start difference. First operand 1771 states and 2317 transitions. Second operand has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:52:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:37,649 INFO L93 Difference]: Finished difference Result 3365 states and 4398 transitions. [2022-07-23 05:52:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:52:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-23 05:52:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:37,655 INFO L225 Difference]: With dead ends: 3365 [2022-07-23 05:52:37,655 INFO L226 Difference]: Without dead ends: 3365 [2022-07-23 05:52:37,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:52:37,656 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 828 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:37,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 2234 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 791 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-07-23 05:52:37,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-07-23 05:52:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3110. [2022-07-23 05:52:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2842 states have (on average 1.322308233638283) internal successors, (3758), 2925 states have internal predecessors, (3758), 112 states have call successors, (112), 62 states have call predecessors, (112), 124 states have return successors, (224), 122 states have call predecessors, (224), 112 states have call successors, (224) [2022-07-23 05:52:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4094 transitions. [2022-07-23 05:52:37,700 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4094 transitions. Word has length 57 [2022-07-23 05:52:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:37,700 INFO L495 AbstractCegarLoop]: Abstraction has 3110 states and 4094 transitions. [2022-07-23 05:52:37,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:52:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4094 transitions. [2022-07-23 05:52:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:52:37,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:37,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:37,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:52:37,920 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,SelfDestructingSolverStorable63 [2022-07-23 05:52:37,920 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -773789014, now seen corresponding path program 1 times [2022-07-23 05:52:37,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:37,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306186994] [2022-07-23 05:52:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:37,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:38,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-23 05:52:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:52:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306186994] [2022-07-23 05:52:38,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306186994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502765626] [2022-07-23 05:52:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:38,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:38,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:38,166 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) [2022-07-23 05:52:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:52:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-23 05:52:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:38,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:38,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:38,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:39,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 26 [2022-07-23 05:52:39,006 INFO L356 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-07-23 05:52:39,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 19 [2022-07-23 05:52:39,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:52:39,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-23 05:52:39,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:52:39,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:39,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:45,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502765626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:45,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:52:45,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2022-07-23 05:52:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15936223] [2022-07-23 05:52:45,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:45,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:52:45,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:52:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:52:45,484 INFO L87 Difference]: Start difference. First operand 3110 states and 4094 transitions. Second operand has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:52:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:47,274 INFO L93 Difference]: Finished difference Result 5221 states and 6875 transitions. [2022-07-23 05:52:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 05:52:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-23 05:52:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:47,282 INFO L225 Difference]: With dead ends: 5221 [2022-07-23 05:52:47,282 INFO L226 Difference]: Without dead ends: 5221 [2022-07-23 05:52:47,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=413, Invalid=2137, Unknown=0, NotChecked=0, Total=2550 [2022-07-23 05:52:47,283 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1723 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 3234 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:47,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 3234 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1377 Invalid, 0 Unknown, 507 Unchecked, 0.7s Time] [2022-07-23 05:52:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5221 states. [2022-07-23 05:52:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5221 to 4407. [2022-07-23 05:52:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4045 states have (on average 1.323114956736712) internal successors, (5352), 4147 states have internal predecessors, (5352), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 172 states have call predecessors, (312), 156 states have call successors, (312) [2022-07-23 05:52:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 5820 transitions. [2022-07-23 05:52:47,341 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 5820 transitions. Word has length 57 [2022-07-23 05:52:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:47,341 INFO L495 AbstractCegarLoop]: Abstraction has 4407 states and 5820 transitions. [2022-07-23 05:52:47,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:52:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 5820 transitions. [2022-07-23 05:52:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:52:47,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:47,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-07-23 05:52:47,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:52:47,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:47,558 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513920, now seen corresponding path program 1 times [2022-07-23 05:52:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926785697] [2022-07-23 05:52:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:47,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-23 05:52:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:52:47,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:47,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926785697] [2022-07-23 05:52:47,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926785697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:47,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941466674] [2022-07-23 05:52:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:47,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:47,875 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) [2022-07-23 05:52:47,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:52:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-23 05:52:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:48,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:48,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:48,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:48,460 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-07-23 05:52:48,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-07-23 05:52:48,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:48,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:48,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941466674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:48,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:52:48,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2022-07-23 05:52:48,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032307829] [2022-07-23 05:52:48,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:48,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:52:48,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:52:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:52:48,567 INFO L87 Difference]: Start difference. First operand 4407 states and 5820 transitions. Second operand has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:52:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:49,699 INFO L93 Difference]: Finished difference Result 6237 states and 8242 transitions. [2022-07-23 05:52:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:52:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-23 05:52:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:49,709 INFO L225 Difference]: With dead ends: 6237 [2022-07-23 05:52:49,709 INFO L226 Difference]: Without dead ends: 6237 [2022-07-23 05:52:49,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 05:52:49,710 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1366 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:49,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 2924 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:52:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2022-07-23 05:52:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4473. [2022-07-23 05:52:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4473 states, 4111 states have (on average 1.3218195086353686) internal successors, (5434), 4207 states have internal predecessors, (5434), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 178 states have call predecessors, (312), 156 states have call successors, (312) [2022-07-23 05:52:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4473 states to 4473 states and 5902 transitions. [2022-07-23 05:52:49,770 INFO L78 Accepts]: Start accepts. Automaton has 4473 states and 5902 transitions. Word has length 57 [2022-07-23 05:52:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:49,771 INFO L495 AbstractCegarLoop]: Abstraction has 4473 states and 5902 transitions. [2022-07-23 05:52:49,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:52:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4473 states and 5902 transitions. [2022-07-23 05:52:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:52:49,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:49,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-07-23 05:52:49,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:52:49,989 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,SelfDestructingSolverStorable65 [2022-07-23 05:52:49,990 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513919, now seen corresponding path program 1 times [2022-07-23 05:52:49,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:49,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068020557] [2022-07-23 05:52:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:50,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-23 05:52:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:52:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:50,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068020557] [2022-07-23 05:52:50,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068020557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:50,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193977698] [2022-07-23 05:52:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:50,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:50,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:50,456 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) [2022-07-23 05:52:50,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:52:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-23 05:52:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:50,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:50,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:50,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:50,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:51,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:51,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 33 [2022-07-23 05:52:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:51,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:51,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-23 05:52:51,236 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-23 05:52:51,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 17 [2022-07-23 05:52:51,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:51,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:51,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:53,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193977698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:53,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:52:53,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2022-07-23 05:52:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707570778] [2022-07-23 05:52:53,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:53,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:52:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:53,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:52:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:52:53,794 INFO L87 Difference]: Start difference. First operand 4473 states and 5902 transitions. Second operand has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 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) [2022-07-23 05:52:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:52:56,125 INFO L93 Difference]: Finished difference Result 7486 states and 9907 transitions. [2022-07-23 05:52:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:52:56,126 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 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 57 [2022-07-23 05:52:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:52:56,137 INFO L225 Difference]: With dead ends: 7486 [2022-07-23 05:52:56,137 INFO L226 Difference]: Without dead ends: 7486 [2022-07-23 05:52:56,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=528, Invalid=2228, Unknown=0, NotChecked=0, Total=2756 [2022-07-23 05:52:56,139 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 2209 mSDsluCounter, 3429 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2209 SdHoareTripleChecker+Valid, 3722 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:52:56,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2209 Valid, 3722 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-23 05:52:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2022-07-23 05:52:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 4566. [2022-07-23 05:52:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4204 states have (on average 1.318744053282588) internal successors, (5544), 4291 states have internal predecessors, (5544), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 187 states have call predecessors, (312), 156 states have call successors, (312) [2022-07-23 05:52:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6012 transitions. [2022-07-23 05:52:56,198 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6012 transitions. Word has length 57 [2022-07-23 05:52:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:52:56,199 INFO L495 AbstractCegarLoop]: Abstraction has 4566 states and 6012 transitions. [2022-07-23 05:52:56,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 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) [2022-07-23 05:52:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6012 transitions. [2022-07-23 05:52:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:52:56,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:52:56,200 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:52:56,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-23 05:52:56,415 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,SelfDestructingSolverStorable66 [2022-07-23 05:52:56,416 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:52:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:52:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1940784111, now seen corresponding path program 1 times [2022-07-23 05:52:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:52:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834498964] [2022-07-23 05:52:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:52:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:52:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:56,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:52:56,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834498964] [2022-07-23 05:52:56,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834498964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:52:56,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556822195] [2022-07-23 05:52:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:52:56,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:52:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:52:56,857 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) [2022-07-23 05:52:56,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:52:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:52:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-23 05:52:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:52:57,063 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:52:57,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:52:57,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:52:57,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:52:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:57,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-07-23 05:52:57,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:57,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-07-23 05:52:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:57,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-07-23 05:52:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:57,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-07-23 05:52:57,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-23 05:52:57,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 26 [2022-07-23 05:52:57,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:52:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:52:57,956 INFO L356 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2022-07-23 05:52:57,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2022-07-23 05:52:57,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:57,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 05:52:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:52:57,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:58,192 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:58,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-07-23 05:52:58,200 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:58,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-07-23 05:52:58,524 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:58,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-07-23 05:52:58,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:58,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1076 treesize of output 1077 [2022-07-23 05:52:58,593 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:58,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 976 treesize of output 910 [2022-07-23 05:52:58,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:52:58,614 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:52:58,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 922 treesize of output 804 [2022-07-23 05:53:26,870 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:53:26,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 50 [2022-07-23 05:53:26,880 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:53:26,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-07-23 05:53:26,900 INFO L356 Elim1Store]: treesize reduction 3, result has 82.4 percent of original size [2022-07-23 05:53:26,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 112 [2022-07-23 05:53:26,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:26,952 INFO L356 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2022-07-23 05:53:26,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 690 treesize of output 674 [2022-07-23 05:53:26,978 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:53:26,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 660 treesize of output 548 [2022-07-23 05:53:26,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 243 [2022-07-23 05:53:27,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 438 [2022-07-23 05:53:27,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 406 [2022-07-23 05:53:28,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556822195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:53:28,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:53:28,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-07-23 05:53:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677502561] [2022-07-23 05:53:28,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:53:28,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:53:28,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:53:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1660, Unknown=21, NotChecked=0, Total=1806 [2022-07-23 05:53:28,427 INFO L87 Difference]: Start difference. First operand 4566 states and 6012 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 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) [2022-07-23 05:53:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:29,747 INFO L93 Difference]: Finished difference Result 8217 states and 11031 transitions. [2022-07-23 05:53:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:53:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 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 57 [2022-07-23 05:53:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:29,759 INFO L225 Difference]: With dead ends: 8217 [2022-07-23 05:53:29,759 INFO L226 Difference]: Without dead ends: 8217 [2022-07-23 05:53:29,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=424, Invalid=2861, Unknown=21, NotChecked=0, Total=3306 [2022-07-23 05:53:29,760 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 2139 mSDsluCounter, 4361 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 4578 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:53:29,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2139 Valid, 4578 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1743 Invalid, 0 Unknown, 248 Unchecked, 0.6s Time] [2022-07-23 05:53:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8217 states. [2022-07-23 05:53:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8217 to 4974. [2022-07-23 05:53:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4974 states, 4586 states have (on average 1.3148713475795901) internal successors, (6030), 4677 states have internal predecessors, (6030), 170 states have call successors, (170), 93 states have call predecessors, (170), 186 states have return successors, (340), 203 states have call predecessors, (340), 170 states have call successors, (340) [2022-07-23 05:53:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4974 states to 4974 states and 6540 transitions. [2022-07-23 05:53:29,824 INFO L78 Accepts]: Start accepts. Automaton has 4974 states and 6540 transitions. Word has length 57 [2022-07-23 05:53:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:29,824 INFO L495 AbstractCegarLoop]: Abstraction has 4974 states and 6540 transitions. [2022-07-23 05:53:29,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 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) [2022-07-23 05:53:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4974 states and 6540 transitions. [2022-07-23 05:53:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:53:29,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:29,825 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:53:29,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-23 05:53:30,041 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,SelfDestructingSolverStorable67 [2022-07-23 05:53:30,041 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-23 05:53:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:30,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1239719533, now seen corresponding path program 1 times [2022-07-23 05:53:30,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:30,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657487947] [2022-07-23 05:53:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:30,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 05:53:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:53:30,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657487947] [2022-07-23 05:53:30,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657487947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:53:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491982033] [2022-07-23 05:53:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:30,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:30,964 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) [2022-07-23 05:53:30,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:53:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-23 05:53:31,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:53:31,127 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:53:31,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:53:31,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:53:31,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:53:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:31,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2022-07-23 05:53:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:31,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2022-07-23 05:53:31,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:31,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-07-23 05:53:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:31,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-07-23 05:53:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:31,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:53:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:31,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 26 [2022-07-23 05:53:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:31,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:53:31,850 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-23 05:53:31,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 51 [2022-07-23 05:53:31,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 26 [2022-07-23 05:53:32,079 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:53:32,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-07-23 05:53:32,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:32,089 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-07-23 05:53:32,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 05:53:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:53:32,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:53:32,339 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1314 (Array Int Int)) (v_ArrVal_1312 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1314) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1312)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4)))) 4) 0)) (forall ((v_ArrVal_1312 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1312)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))))) 4) 0))) is different from false [2022-07-23 05:53:32,892 INFO L356 Elim1Store]: treesize reduction 28, result has 54.8 percent of original size [2022-07-23 05:53:32,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 99 [2022-07-23 05:53:33,043 INFO L356 Elim1Store]: treesize reduction 126, result has 61.2 percent of original size [2022-07-23 05:53:33,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 new quantified variables, introduced 21 case distinctions, treesize of input 2331 treesize of output 2307 [2022-07-23 05:53:33,098 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:53:33,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4294 treesize of output 3998 [2022-07-23 05:53:33,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-07-23 05:53:34,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-07-23 05:53:35,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-07-23 05:53:37,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:53:37,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 662 treesize of output 664 [2022-07-23 05:53:39,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-07-23 05:53:41,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-07-23 05:53:44,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2888 treesize of output 2878 [2022-07-23 05:53:47,086 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:53:47,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2907 treesize of output 2903 [2022-07-23 05:53:50,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2888 treesize of output 2878 [2022-07-23 05:53:51,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2888 treesize of output 2878 [2022-07-23 05:53:52,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2805 treesize of output 2795